US20220185226A1 - Active pedestrian hood hinge with integrated latch assembly - Google Patents
Active pedestrian hood hinge with integrated latch assembly Download PDFInfo
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- US20220185226A1 US20220185226A1 US17/440,369 US202017440369A US2022185226A1 US 20220185226 A1 US20220185226 A1 US 20220185226A1 US 202017440369 A US202017440369 A US 202017440369A US 2022185226 A1 US2022185226 A1 US 2022185226A1
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- bracket
- hood
- pawl
- deploy
- relative
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/34—Protecting non-occupants of a vehicle, e.g. pedestrians
- B60R21/38—Protecting non-occupants of a vehicle, e.g. pedestrians using means for lifting bonnets
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05D—HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS
- E05D3/00—Hinges with pins
- E05D3/06—Hinges with pins with two or more pins
- E05D3/14—Hinges with pins with two or more pins with four parallel pins and two arms
- E05D3/145—Hinges with pins with two or more pins with four parallel pins and two arms specially adapted for vehicles
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05D—HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS
- E05D11/00—Additional features or accessories of hinges
- E05D2011/009—Impact absorbing hinges for vehicle doors
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
- E05Y2900/00—Application of doors, windows, wings or fittings thereof
- E05Y2900/50—Application of doors, windows, wings or fittings thereof for vehicles
- E05Y2900/53—Type of wing
- E05Y2900/536—Hoods
Definitions
- the present disclosure relates generally to pedestrian protection systems for motor vehicles of the type having a deployable hood assembly equipped with active hinges. More particularly, the present disclosure is directed to an active hinge for use with a deployable hood assembly and which has locking element which limits movement of a hood bracket relative to a body bracket.
- a “passive” pedestrian protection system associated with the hood assembly includes providing a pocket of under-hood crush space between the hood and the components within the vehicle's engine compartment. This crush space is configured to reduce the chance of bodily impact with the components within the engine component and, more particularly, to provide an impact absorbing feature.
- This crush space is configured to reduce the chance of bodily impact with the components within the engine component and, more particularly, to provide an impact absorbing feature.
- the use of low profile hoods in modern motor vehicles for improved aesthetics and aerodynamics, in combination with smaller engine compartments limits the available crush space.
- an “active” pedestrian protection system associated with the vehicle's hood assembly provides a “deployable” hood that is configured to raise a rear portion of the latched hood to create the additional under-hood crush space.
- This deployable hood feature is activated in response to detection of a pedestrian collision with the front end of the motor vehicle.
- a pair of active hinges are incorporated into the hood assembly.
- Each active hinge includes a pivot linkage interconnecting the hood to the vehicle body and an actuator that is operable to forcibly move the pivot linkage for causing the hood to move from a non-deployed position to a deployed position in response to detection of the pedestrian impact. Examples of active hinges that provide this functionality are disclosed in commonly-owned U.S. Pat. No. 8,544,590 and U.S. Publication No. 2014/0182962.
- an active hinge includes a hood bracket for attachment to a vehicle hood, a body bracket for attachment to a vehicle body, and a deploy bracket pivotally connected to the hood bracket and the body bracket.
- a pawl is pivotally connected to the hood bracket.
- a bolt is fixed to the deploy bracket.
- the pawl is moveable between a locked position wherein the pawl engages the bolt to fix the hood bracket relative to the deploy bracket, and an unlocked position in which the pawl is spaced from the bolt which allows relative movement between the hood bracket and the deploy bracket.
- An actuator is configured to move the pawl from the locked position to the unlocked position and to cause the hood bracket to move relative to the body bracket in response to a detection of a collision event. At least one locking element limits movement of the hood bracket relative to the body bracket.
- a method of operating an active hinge of a vehicle during a collision event includes providing a hood bracket for attachment to a vehicle hood.
- the method also includes providing a body bracket for attachment to a vehicle body.
- the method also includes providing a deploy bracket pivotally connected to the hood bracket and the body bracket.
- the method further includes providing a pawl that is pivotally connected to the hood bracket.
- the method also includes providing a bolt that is fixed to the deploy bracket.
- the method also includes actuating an actuator in response to a detection of the collision event, wherein the actuator moves the pawl from a locked position in which the pawl engages the bolt to fix the hood bracket relative to the deploy bracket, to an unlocked position in which the pawl is spaced from the bolt allowing relative movement between the hood bracket and the deploy bracket.
- the method further includes inhibiting movement of the hood bracket relative to the body bracket with a locking element after the hood bracket has moved a predetermined distance relative to the body bracket.
- an active hinge includes a hood bracket for attachment to a vehicle hood, a body bracket for attachment to a vehicle body, and a deploy bracket pivotally connected to the hood bracket and the body bracket.
- a locking mechanism releasably couples the hood bracket and the deploy bracket.
- the locking mechanism comprises a locked state to fix the hood bracket relative to the deploy bracket, and an unlocked state to allow relative movement between the hood bracket and the deploy bracket. At least one locking element limits movement of the hood bracket relative to the body bracket.
- FIG. 1 is a first side front perspective view of a vehicle hood assembly having a hood and an active hinge constructed in accordance with the present disclosure and showing the vehicle hood assembly located in a normal-closed position with the hood in a latched condition and the active hinge in a non-deployed condition;
- FIG. 2 is a similar first side perspective view as FIG. 1 , now showing the vehicle hood assembly in a deployed position with the hood maintained in its latched condition and its rear edge segment raised and with the active hinge in a deployed condition;
- FIG. 3 is a first side view of a first example embodiment of an active hinge illustrating a pawl in a locked position and a hood bracket in a non-deployed position;
- FIG. 4 is a second side view of the first example embodiment of an active hinge illustrating the pawl in the locked position and the hood bracket in a non-deployed position;
- FIG. 5 is a magnified first side view of a hood bracket and deploy bracket of the first example embodiment of an active hinge illustrating the pawl in the locked position and the hood bracket in a non-deployed position, and further illustrating an actuator for rotating the pawl;
- FIG. 6 is a front perspective view of the first example embodiment of an active hinge illustrating the pawl in the locked position and the hood bracket in a non-deployed position;
- FIG. 7 is a magnified view of the pawl and a bolt of FIG. 6 ;
- FIG. 7A is a side cross-sectional view of the bolt of FIG. 6 ;
- FIG. 8 is a magnified view of the hood bracket, deploy bracket, pawl and bolt of FIG. 1 , illustrating rotation of the pawl from a locked position to an unlocked position in response to engagement by an actuator;
- FIG. 9 is a first side view of the pawl of the first example embodiment of an active hinge
- FIG. 10A is a side schematic view illustrating a safety bolt positioned against a bracket and received by a pocket of a pawl prior to applying a compressive axial force to the safety bolt;
- FIG. 10B is a side schematic view illustrating the safety bolt of FIG. 10A after a compressive axial force has been applied to the safety bolt;
- FIG. 10C is a side schematic view illustrating the safety bolt of FIG. 10A after a compressive axial force has been applied to the safety bolt;
- FIG. 11 is a flow diagram illustrating a method of aligning a safety bolt relative to a bracket and pawl and applying a compressive force to the safety bolt;
- FIG. 12 is a first side perspective view of a second example embodiment of an active hinge illustrating a pawl in a locked position and a hood bracket in a non-deployed position;
- FIG. 13 is a first side perspective view of the second example embodiment of an active hinge illustrating the pawl in the locked position and the hood bracket in the non-deployed position, and not including the actuator;
- FIG. 14 is a magnified view of the pawl and a bolt of FIG. 11 ;
- FIG. 15 is a first side perspective view of the second example embodiment of an active hinge illustrating the pawl in an locked position and the hood bracket in the non-deployed position;
- FIG. 16 is a first side perspective view of the second example embodiment of an active hinge illustrating the pawl in a locked position and the hood bracket in the non-deployed position, and not including the actuator;
- FIG. 17 is a first side perspective view of the second example embodiment of an active hinge illustrating the pawl in an locked position and the hood bracket in a deployed position;
- FIG. 18 is a first side perspective view of the second example embodiment of an active hinge illustrating the pawl in an locked position and the hood bracket in a deployed position, and not including the actuator;
- FIG. 19 is a first side view of a third example embodiment of a pawl having an extended hook portion and contact face.
- FIG. 20 is another first side view of the third example embodiment of a pawl having an extended hook portion and contact face.
- FIG. 21A is a schematic diagram of an active hinge having a locking mechanism in a locked state, in accordance with an illustrative embodiment
- FIG. 21B is a schematic diagram of an active hinge of FIG. 21A having a locking mechanism in an unlocked state, in accordance with an illustrative embodiment
- FIG. 22A is a schematic diagram of an active hinge having a linearly moveable locking mechanism in a locked state, in accordance with an illustrative embodiment
- FIG. 22B is a schematic diagram of an active hinge of FIG. 22A having a linearly moveable locking mechanism in an unlocked state, in accordance with an illustrative embodiment
- FIG. 23 is a perspective view of a deploy bracket, body bracket, hood bracket and pawl of a third example embodiment of an active hinge illustrating that the deploy bracket is unable to move upward and rearward in some arrangements due to interference from vehicle components and body metal;
- FIG. 24 is a first side perspective view of a hood bracket in a closed position relative to a deploy bracket of the third example embodiment of an active hinge;
- FIG. 25 is a first side perspective view of a hood bracket in an open position relative to a deploy bracket of the third example embodiment of an active hinge;
- FIG. 26 is a first side perspective view of the third example embodiment of an active hinge moving a hood in an upward and forward position, which may cause interference with a part of a vehicle body;
- FIG. 27 is a first side perspective view of a fourth example embodiment of an active hinge
- FIG. 28 is a second side perspective view of the fourth example embodiment of an active hinge
- FIG. 29 is another first side perspective view of the fourth example embodiment of an active hinge
- FIG. 30 is another first side perspective view of the fourth example embodiment of an active hinge
- FIG. 31 is a magnified view of an actuator and locking hook of FIG. 30 ;
- FIG. 32 is a magnified view of a hood bracket, deploy bracket, pawl, actuator and locking hook of FIG. 30 ;
- FIG. 33 is a second side perspective view of the locking hook of the fourth example embodiment of an active hinge, illustrating pivoting of the locking hook;
- FIG. 34 is another first side perspective view of the fourth example embodiment of an active hinge illustrating a path of motion of the hood bracket during a normal pivoting, or non-active pedestrian protection operation, of the hood bracket;
- FIG. 35 is a magnified view of the locking hook and actuator of FIG. 33 ;
- FIG. 36 is a magnified view of a hood bracket, deploy bracket, pawl, locking hook and actuator of FIG. 31 ;
- FIG. 37 is another second side perspective view of the locking hook of the fourth example embodiment of an active hinge, illustrating pivoting of the locking hook into alignment with a tab of the deploy bracket;
- FIG. 38 is another second side perspective view of the locking hook of the fourth example embodiment of an active hinge, illustrating pivoting of the locking hook into alignment with a tab of the deploy bracket;
- FIG. 39 is a second side perspective view of the actuator engaging a contact surface of the hood bracket of the fourth example embodiment of an active hinge, illustrating pivoting movement of the locking hook and the hood bracket and the pawl in response to engagement with an actuator;
- FIG. 40 is a first side perspective view of the actuator providing movement of the hood bracket relative to the deploy bracket of the fourth embodiment of an active hinge, illustrating the deploy bracket fixed in place relative to the body bracket by the locking hook;
- FIG. 41 is a first side perspective view of the actuator providing further movement of the hood bracket relative to the deploy bracket of the fourth embodiment of an active hinge, illustrating the deploy bracket fixed in place relative to the body bracket by the locking hook;
- FIG. 42 is a flow chart of a method for assembling an active hinge for a motor vehicle, in accordance with an illustrative embodiment
- FIG. 43 is a first side view of a first example embodiment of a pawl
- FIG. 44 is a first side view of a second example embodiment of a pawl having an extended hook portion and contact face;
- FIG. 45 is another first side view of the second example embodiment of a pawl having an extended hook portion and contact face;
- FIG. 46 is a first side view of a pawl of a fifth example embodiment of an active hinge, illustrating the pawl during ordinary usage
- FIG. 47 is another first side view of the pawl of the fifth example embodiment of the active hinge, illustrating initial activation of an actuator in response to the detection of a collision event;
- FIG. 48 is another first side view of the pawl of the fifth example embodiment of the active hinge, illustrating breaking of a connection between the pawl and a shear screw in response to actuation of the actuator and rotation of the pawl;
- FIGS. 49-57 are perspective views of the fifth example embodiment of an active hinge, illustrating assembly of the active hinge
- FIGS. 58-59 are first side perspective views of a sixth example embodiment of an active hinge, illustrating how an actuator of the active hinge is mounted to a body component of the vehicle;
- FIGS. 60-61 are first side perspective views of a seventh example embodiment of an active hinge, illustrating how an actuator of the active hinge is mounted to a body component of a vehicle;
- FIGS. 62-63F are first side views of an eight example embodiment of an active hinge illustrating various stages of deployment of the active hinge and how a locking element limits movement of a hood bracket;
- FIG. 64A is a first side view of an alternative embodiment of a second locking leg of an active hinge which allows for deformation of the second locking leg during an application of a downward force against a hood of the vehicle;
- FIG. 64B is a perspective view of the second locking leg of FIG. 64A ;
- FIG. 65 is a side view of the an alternative embodiment of a locking contour of an active hinge which allows for downward movement of a second locking leg during an application of a downward force against a hood of the vehicle;
- FIG. 66 is a flow diagram illustrating operation of the eight embodiment of the active hinge.
- Example embodiments of a vehicle hood assembly having a hood and at least one active hinge embodying the teachings of the present disclosure will now be described more fully with reference to the accompanying drawings.
- the example embodiments are only provided so that this disclosure will be thorough, and will fully convey the scope to those who are skilled in the art. Numerous specific details are set forth such as examples of specific components, devices, and methods, to provide a thorough understanding of embodiments of the present disclosure. It will be apparent to those skilled in the art that specific details need not be employed, that the example embodiments may be embodied in many different forms and that neither should be construed to limit the scope of the disclosure. In some example embodiments, well-known processes, well-known device structures, and well-known technologies are not described in detail.
- the active hinges of the present disclosure are used as part of a hood assembly for a pedestrian protection system on motor vehicles. More specifically, active hinges of the type disclosed herein are used for mounting a vehicle hood to a vehicle body in an effort to introduce an additional degree of freedom in the movement of the vehicle's hood when a pedestrian is struck by the vehicle to reduce the severity of injuries sustained when the pedestrian contacts the vehicle's hood.
- FIG. 1 illustrates a side elevational view of a vehicle hood assembly 10 generally configured to include a hood 12 and at least one active hinge 9 .
- vehicle is intended to broadly encompass any car, truck, SUV, van or any other type of passenger carrying vehicle.
- Hood assembly 10 is configured to overlie an engine compartment of the vehicle, as defined by the vehicle's body.
- Hood 12 is shown to include a front segment 16 , a rear segment 18 and a pair of laterally-spaced side segments 20 .
- front segment 16 of hood 12 is configured to be located proximate to a front portion of the vehicle while rear segment 18 of hood 12 is configured to be located proximate to the vehicle's windshield.
- a pair of active hinges 9 are associated with hood assembly 10 , each being located adjacent to one of side segments 20 of hood 12 and being configured to allow hood 12 to pivot between an open position with front segment 16 elevated to provide access to engine compartment and a normal-closed position whereat hood 12 is lowered to provide an unobstructed view for the person operating the vehicle.
- FIG. 1 illustrates active hinge 9 positioned such that hood 12 pivots in proximity to its rear segment 18 .
- the vehicle is also equipped with a hood latching device 21 shown to include a striker 22 fixed to an underside portion of front segment 16 of hood 12 and a latch 24 mounted to a structural portion 26 of the vehicle's body.
- FIG. 1 illustrates active hinge 9 positioned such that hood 12 pivots in proximity to its rear segment 18 .
- the vehicle is also equipped with a hood latching device 21 shown to include a striker 22 fixed to an underside portion of front segment 16 of hood 12 and a latch 24 mounted to a structural portion 26 of the vehicle'
- FIG. 1 illustrates striker 22 engaged and held by latch 24 so as to located hood assembly 10 in its normal-closed position with active hinge 9 maintained in a “non-deployed” condition, whereby front segment 16 of hood is latched and rear segment 18 of hood 12 is located in its conventional lowered position.
- active hinge 9 includes a pedestrian protection device that functions automatically in the event of a vehicle impact with a pedestrian. Specifically, the pedestrian protection device functions to shift active hinge 9 from its non-deployed state into a “deployed” condition, as shown in FIG. 2 , where rear segment 18 of hood 12 is moved to a raised or deployed position while front segment 16 of hood 12 remains latched via latching device 21 .
- active hinge 9 provides an additional degree of freedom in its movement to permit rear segment 18 of hood 12 to move from its normal lowered position ( FIG. 1 ) into its raised position ( FIG. 2 ).
- FIGS. 3-9 present a first embodiment of an active hinge 14 according to another aspect of the disclosure.
- FIG. 3 presents the active hinge 14 in its non-deployed condition.
- the active hinge 14 generally includes a body bracket 30 , a hood bracket 32 , a deploy bracket 34 , and a pivot linkage mechanism interconnecting the body bracket 30 and deploy bracket 34 .
- the pivot linkage mechanism includes a first link 36 and a second link 38 arranged to define a four-bar linkage 40 .
- the first link 36 has one end pivotally connected to the body bracket 30 via a first pivot pin 60 and its opposite end pivotally connected to deploy bracket 34 via a second pivot pin 62 .
- second link 38 is shown having a first end pivotally connected to body bracket 30 via a first pivot pin 64 and its second end pivotally connected to deploy bracket 34 via a second pivot pin 66 .
- a third pivot pin 70 pivotally connects a terminal end segment of deploy bracket 34 to the hood bracket 32 .
- a fourth pin 72 further interconnects the deploy bracket 34 and the hood bracket 32 .
- the fourth pin 72 is spaced from the third pivot pin 70 along the hood bracket 32 .
- the hood bracket 32 defines an elongated slot 74 that receives the fourth pin 72 .
- the slot extends between a first end 76 and a second end 78 .
- the fourth pin 72 slides between, and is limited in movement by the first and second ends 76 , 78 of the slot 74 to limit the rotational range of the hood bracket 32 relative to the deploy bracket 34 between a deployed position in which the fourth pin 72 engages the second end 78 of the slot 74 , and a non-deployed position in which the fourth pin 72 engages the first end 76 of the slot 74 .
- a pawl 80 is pivotally connected to the hood bracket 32 along a fifth pin 82 .
- the pawl 80 acting as an illustrative type of moveable lever includes a hook portion 84 that has an engagement face 85 which defines a lower pocket 86 .
- the hook portion 84 is spaced from the fifth pin 82 .
- a safety bolt 88 is fixed to the deploy bracket 34 .
- the hook portion 84 of the pawl 80 is configured to partially surround a bottom portion 90 of the safety bolt 88 , while the pawl 80 is positioned in a locked position (e.g., as shown in FIGS.
- the safety bolt 88 is received by the lower pocket 86 of the pawl 80 to inhibit pivoting of the hood bracket 32 relative to the deploy bracket 34 about the third pivot pin 70 .
- the lower pocket 86 surrounds approximately half of the safety bolt 88 .
- the hood bracket 32 defines an upper pocket 92 that is configured to partially surround a top portion 91 of the safety bolt 88 while the hood bracket 32 is in the non-deployed position. As best illustrated in FIGS.
- the safety bolt 88 has a generally frusto-conical shape and tapers from a wider portion 94 spaced from the deploy bracket 34 to a narrower portion 96 coupled with and received by the deploy bracket 34 along a tapered region 35 .
- the wider portion 94 has a first diameter D 1 that is larger than a second diameter D 2 of the narrower portion 96 .
- the safety bolt 88 initially has a generally cylindrical shape, and is riveted or otherwise coupled to the deploy bracket 34 to provide an axial compressive force thereto, creating the tapered wall of the safety bolt 88 to drive flared portion of the safety bolt against the engagement face 85 of the pawl 80 to establish a tensed relationship(s), where a movement of the pawl 80 due to the expanded bolt is prevented by the secured fixing of the pawl 80 about the pivot axis 82 .
- Pawl 80 and safety bolt 88 are an illustrative example of a locking mechanism having a locked state to releasably couple the hood bracket 32 and the deploy bracket 34 together, such as for example when the pawl 80 and safety bolt 88 are coupled to prevent the relative movement of the hood bracket 32 and the deploy bracket 34 , and an unlocked state such as for example when the pawl 80 and safety bolt 88 are decoupled to allow the relative movement of the hood bracket 32 and the deploy bracket 34 .
- the safety bolt 88 initially has a generally cylindrical shape, and is riveted or otherwise coupled to the deploy bracket 34 to provide an axial compressive force thereto, creating the tapered wall of the safety bolt 88 to drive the pawl 80 and deploy bracket 34 in opposite directions from one another to fix the hood bracket 32 in the non-deployed position to establish tensed relationship(s).
- the safety bolt 88 may have other tapered shapes, and the tapered shape may be provided in other ways. Tapered shapes may include a budging shape with a gradual reduction in thickness, or an abrupt reduction in thickness, or an uneven reduction in thickness. As illustrated in FIG.
- the hook portion 84 and lower pocket 86 of the pawl 80 generally have an arc shape with a radius of curvature that is sized such that the tapered safety bolt 88 may be received and secured within the pocket 86 of the pawl 80 . It should be appreciated that fixing the hood bracket 32 in the non-deployed position in this manner with the frustoconical shaped safety bolt 88 , and arc-shaped pocket 86 of the pawl 80 advantageously eliminate the need for a spring to hold the hood bracket 32 in the non-deployed position, and prevents noise, rattling and vibrations because the components of the active hinge 14 are held in tension. Holding the components of the active hinge 14 in tension in this manner also eliminates tolerances.
- locking mechanisms may be provided in tensed relationship with the bolt 88 , such as a sliding lever 77 configured to linearly move having a protrusions for engaging the bolt 88 , or a sliding mechanism having detents for engaging the bolt 88 , or a rotating mechanism having detents for receiving a portion of the bolt 88 (see for example FIGS. 22A and 22B ), as examples and without limitation.
- the safety bolt 88 may be pre-compressed into position during early stages of manufacturing, or after all of the components of the active hinge 14 are assembled and with the pawl 80 in the locked position. More particularly, as illustrated in FIGS. 10A-10B , during assembly of the active hinge 14 , the safety bolt 88 is aligned with/positioned in the lower pocket 86 of the pawl 80 ( FIG. 10A ). Subsequently, as shown in FIG. 10B , the safety bolt 88 is axially crushed to form its frusto-conical shape, which causes the safety bolt 88 to be locked within the pocket 86 of the pawl 80 . As a result, any radial clearance between the safety bolt 88 and pawl 80 is eliminated, therefore providing an anti-chucking effect.
- FIG. 11 presents a method of assembling the active hinge 14 according to an aspect of the disclosure.
- the method includes 200 providing a pawl 80 with a closing force vector configuration.
- the method continues with 202 axially aligning the pocket 86 of the pawl 80 with the safety bolt 88 .
- the pawl 80 and safety bolt 88 may be attached to any of the brackets 30 , 32 , 34 or links 36 , 38 , but should be positioned on different brackets 30 , 32 , 34 and links 36 , 38 than one another.
- the method continues with 204 applying an axial compressive force to the safety bolt 88 when the pocket 86 of the pawl 80 is aligned with the safety bolt 88 to expand the safety bolt 88 and eliminate radial gaps between the safety bolt 88 and pawl 80 .
- the pawl 80 further includes a contact face 98 that is spaced from the fifth pin 82 and the hook portion 84 of the pawl 80 .
- a first distance L 1 between the pivot fifth pin 82 and the engagement face 85 is about twice that of a second distance L 2 between the fifth pin 82 and the contact face 98 .
- An actuator 100 is positioned in alignment with the contact face 98 .
- the actuator 100 includes a linearly extendable contact member 102 for engaging the contact face 98 to cause the pawl 80 to rotate about the fifth pin 82 from the locked position into an unlocked position (illustrated in FIG. 8 ).
- the actuator 100 is configured to selectively actuate in response to a control signal being provided by a controller 104 associated with an active passenger protection control system 106 in response to one or more vehicle-mounted sensors 108 or other detection devices detecting the occurrence of a pedestrian collision.
- the actuator 100 includes an electrical connector 110 that would be in electrical connection with the sensor(s) 180 and/or the controller 104 such that an electrical control signal is generated to control actuation of the actuator 100 .
- a one-joint assembly may be utilized as an alternative to the four-bar linkage 40 of the first embodiment of the active hinge 14 .
- FIGS. 12-18 disclose a second embodiment of an active hinge 14 ′ according to another aspect of the disclosure.
- the active hinge 14 ′ generally includes a body bracket 30 ′, a hood bracket 32 ′, a deploy bracket 34 ′, and a pivot linkage mechanism interconnecting the body bracket 30 ′ and deploy bracket 34 ′.
- the pivot linkage mechanism includes a first link 36 ′ and a second link 38 ′ arranged to define a four-bar linkage 40 ′.
- the first link 36 ′ has one end pivotally connected to the body bracket 30 ′ via a first pivot pin 60 ′ and its opposite end pivotally connected to the deploy bracket 34 ′ via a second pivot pin 62 ′.
- second link 38 ′ is shown having a first end pivotally connected to body bracket 30 ′ via a first pivot pin 64 ′ and its second end pivotally connected to deploy bracket 34 via a second pivot pin 66 ′.
- the second link 38 ′ generally has an “L” shape and defines an elbow portion 69 ′ between first and second linear segments 71 ′, 72 ′ that extend generally perpendicularly to one another.
- a third pivot pin 70 ′ pivotally connects a terminal end segment of deploy bracket 34 ′ to the hood bracket 32 ′.
- a pawl 80 ′ is pivotally connected to the elbow portion 69 ′ of the of the second link 38 ′ along a fifth pivot pin 82 ′.
- the pawl 80 ′ includes a hook portion 84 ′ that has an engagement face 85 ′ that defines a lower pocket 86 ′.
- the hook portion 84 ′ is spaced from the fifth pin 82 ′.
- a safety bolt 88 ′ is fixed to the body bracket 30 ′.
- the lower pocket 86 ′ of the hook portion 84 ′ of the pawl 80 ′ is configured to partially surround a bottom portion 90 ′ of the safety bolt 88 ′, while the pawl 80 ′ is positioned in a locked position (e.g., as shown in FIGS.
- the safety bolt 88 ′ has a generally frustoconical shape and tapers between a wider portion 94 ′ spaced from the body bracket 30 ′ to a narrower portion 96 ′ coupled with the body bracket 30 ′.
- the wider portion 94 ′ has a larger diameter than the narrower portion 96 ′.
- the safety bolt is riveted or otherwise connected to the body bracket 30 ′ such that the tapered wall of the safety bolt 88 ′ drives the pawl 80 ′ downwardly to fix the deploy bracket 34 ′ in the non-deployed position relative to the body bracket 30 ′.
- fixing the deploy bracket 34 ′ in the non-deployed position in this manner with the frustoconical shape safety bolt 88 ′ advantageously eliminates the need for a spring to hold the deploy bracket 34 ′ in the non-deployed position and prevents noise, rattling and vibrations because the components of the active hinge 14 ′ are held in tension. Holding the components of the active hinge in tension in this manner also eliminates tolerances.
- the safety bolt 88 , 88 ′ may be pre-compressed into position as discussed during early stages of manufacturing or after all of the components of the active hinge 14 , 14 ′ are assembled and with the pawl 80 , 80 ′ in the locked position.
- the safety bolt 88 , 88 ′ may be fabricated such that it tapers prior to being installed on the active hinge 14 , 14 ′, with the safety bolt 88 , 88 ′ driving the pawl 80 , 80 ′ into an opposite direction as the opposing component of the active hinge 14 , 14 ′ during axial movement of the safety bolt 88 , 88 ′ to create tension in the components of the active hinge 14 , 14 ′.
- the pawl 80 ′ further includes a contact face 98 ′ that is spaced from the fifth pin 82 ′ and the hook portion 84 ′ of the pawl 80 ′.
- the contact face 98 ′ extends transversely from a planar body portion 99 ′ of the pawl 80 ′.
- an actuator 100 ′ is positioned in alignment with the contact face 98 ′.
- the actuator 100 ′ includes a linearly extendable contact member 102 ′ for engaging the contact face 98 ′ to cause the pawl 80 ′ to rotate about the fifth pin 82 ′ from the locked position into an unlocked position (illustrated in FIGS. 15-18 ).
- Rotating the pawl 80 ′ into the unlocked position allows the second link 38 ′ to pivot about the first pivot pin 64 ′, and thus allows the deploy bracket 34 ′ to pivot into the deployed position, thus also allowing the hood bracket 32 ′ and hood to move into the deployed position. It should be appreciated that other components of the active hinge 14 ′ may be configured to move relative to one another in a similar manner in response to actuation of the actuator 100 ′ or other actuators.
- the pawl 80 , 80 ′ of both embodiments of active hinge 14 , 14 ′ require a small release angle to be rotated into the unlocked position due to the relative positions between the contact face 98 , 98 ′, the pocket 86 , 86 ′ and the fifth pin 82 , 82 ′. Accordingly, only a small actuator stroke is required to rotate the pawl 80 , 80 ′ into the unlocked position.
- the actuator 100 ′ is configured to selectively actuate in response to a control signal being provided by a controller 104 ′ associated with an active passenger protection control system 106 ′ in response to one or more vehicle-mounted sensors 108 ′ or other detection devices detecting the occurrence of a pedestrian collision.
- the actuator 100 includes an electrical connector 110 that would be in electrical connection with the sensor(s) 180 and/or the controller 104 such that an electrical control signal is generated to control actuation of the actuator 100 ′.
- pawl 80 , 80 ′ and safety bolt 88 , 88 ′ may alternatively be placed on another of the body bracket, 30 , hood bracket 32 , deploy bracket 34 or links 36 , 38 without departing from the scope of the subject disclosure. It should also be appreciated that the second embodiment of an active hinge 14 ′ may be assembled in accordance with the method presented in FIG. 11 .
- FIGS. 19-20 present a third embodiment of a pawl 80 A according to an aspect of the disclosure.
- the lower pocket 86 A of the hook portion 84 A of the pawl 80 A is extended such that it surrounds more than half of the outer circumference of the safety bolt 88 to provide increased locking security while the pawl 80 A is positioned in the locked position.
- a first distance L 1 between the pivot fifth pin 82 and the engagement face 85 is more than twice that of a second distance L 2 between the fifth pin 82 and the contact face 98 . This provides a further reduced actuator stroke length for moving the pawl 80 A from the locked to unlocked position.
- an active hinge 9 in addition to FIGS. 1 through 20 , an active hinge 9 is provided and includes a hood bracket 32 for attachment to a vehicle hood 12 , a body bracket 30 for attachment to a vehicle body, and may include a number of intermediary components such as bracket 34 and linkages 36 , 38 , for example.
- a locking mechanism 200 for example pawl 80 , is coupled between the hood bracket 32 and the body bracket 30 , the locking mechanism 200 comprising an unlocked state for example as shown in FIGS. 8 and 15 for allowing the hood bracket 32 to move away (e.g. upwardly) from the body bracket 30 and a locked state for example as shown in FIG. 5 and FIG.
- the locking mechanism 200 further comprising a bolt 88 in a tensed relationship with the locking mechanism 200 for maintaining the locking mechanism 200 in the locked state.
- An actuator 100 is provided for selectively actuating, for example a pyrotechnic actuator deploying a plunger in response to receiving an electrical signal corresponding to a detection of a pedestrian impact from a controller 300 or by a body control module (BCM), the locking mechanism for transitioning the locking mechanism 200 from the locked state to the unlocked state, such that the selectively actuating the locking mechanism 200 relieves the tensed relationship to allow the locking mechanism 200 to transition from the locked state to the unlocked state, and allow the hood 12 to be deployed to an active pedestrian protection position as shown in FIG.
- BCM body control module
- the locking mechanism 200 may include a moveable lever, illustrated as a pivotal pawl 80 , configured for movement (e.g.
- the moveable lever is a pawl 80 configured for pivotal movement about a pivot axis 82 between a locked position and an unlocked position
- the pawl 80 has an engagement surface, for example engagement face 85 , for engagement with the bolt 88 when the pawl 80 is in the locked position to establish the locking state of the locking mechanism 200 , with the tensed relationship established by a portion of the bolt 88 , for example shown as approximately 50 % of the outer circumferential surface of the bolt 88 as seen in FIG. 8 exerting a force F against the engagement surface 85 of the pawl 80 biasing the pawl 80 , for example via the engagement surface 85 , away from the pivot axis 82 .
- the tensed relationship for example due to the expansion forces of the bolt 88 acting on the pawl 80 , is established when the pawl 80 is in the locked position and a portion (e.g. flared head) of the bolt 88 is in an expanded state relative to the other portion of the bolt 88 (e.g. unflared stem). Illustratively as shown in FIG.
- the expanded state of the bolt 88 is shown as a flared head portion, or top portion 91 , due to an applied compression of the bolt 88 in a pre-assembly state where the bolt 88 may be for example a linear pin or straight cylindrical structure, for example during positioning of the pawl 80 in the locked position, to deform the pin to an assembled state where it may engage with upper pocket 92 .
- a further applied compression of the bolt 88 may be provided to further spread out the upper pocket 92 to further engage the planar surface 95 of the pawl 80 , as shown in FIG. 10C .
- the pawl 80 has a hook portion 84 having the engagement surface defining a pocket 86 receiving the bolt 88 , and for example partially receiving the bolt 88 , such that at least a portion of the bolt 88 is in a path blocking a motion of the hook (e.g. counterclockwise as shown in FIG. 8 ) when the pawl 80 is in the locked position, for preventing vibrations due to movement e.g. chucking of the pawl 80 against the bolt 88 .
- the at least a portion of the bolt 88 may remain in a path blocking a motion of the hook 84 (e.g. counterclockwise as shown in FIG. 8 ) when the pawl 80 is being moved from the locked position towards the unlock position.
- Selectively actuating the locking mechanism 200 e.g. releasing the locking mechanism 200 causes the hook 84 , which may be for example the tip of hook 84 , to bypass the portion of the bolt 88 blocking the motion of the hook 84 , such that the hook 84 bypassing the portion of the bolt 88 blocking the motion of the hook 84 causes a localized deformation of at least one of the bolt 88 and the pawl 80 .
- the pawl 80 may be maintained in the locked position without use of a spring, for example which may otherwise be required to bias the pawl 80 in the clockwise direction as viewed in FIG. 8 and prevent vibrations.
- the use of a bolt in lieu of a spring is lower cost and easier to assemble and provide increases in securing of the pawl 80 .
- the applied force exerted by the expanded bolt 88 may increase the coefficient of friction between the bolt 88 and the engagement surface 85 enhancing the securing of the pawl 80 against movement.
- the force of the actuator 100 which may not be overcome due to vibrations during normal operation of the vehicle e.g. driving.
- the pawl surface 85 may therefore be caused to slide against the bolt 88 with resistance proportional to the expansion force of the bolt 88 during movement of the pawl 80 from its locked position to its unlocked position.
- the flared portion of the bolt 88 may adopt a blocking position against a movement of the pawl 80 , for example hook portion 84 of pawl.
- Hook portion 84 may therefore not only increase the surface contact area of the pawl 80 with the bolt 88 e.g. the outer flared perimeter of the bolt 88 , but also the bolt 88 may block the hook portion 84 .
- hook portion 84 in order to bypass the blocking positioning of the expanded bolt 88 may be caused due to the force of the actuator 100 to slightly deform a portion of the perimeter of the bolt 88 .
- the perimeter of the bolt 88 may be deformed by the hook 84 scrapping or indenting or the like the perimeter of the bolt 88 , or the hook portion 84 may cause a larger bending or deflection of the bolt 88 , or the hook portion 84 itself may be deformed, for example bent to allow the pawl 80 to move from the locked position to the unlocked position, depending on the relative strength of the materials of the pawl 80 and the bolt 88 .
- the bolt 88 may be pivotally mounted such that during the pawl 80 moving from the locked position to the unlocked position the engagement of the pawl 80 with the bolt 88 may cause the bolt to rotate e.g. counterclockwise as shown in FIG. 8 .
- FIGS. 23-25 illustrate a third embodiment of an active hinge 14 ′′ according to another aspect of the disclosure.
- Active hinge 14 ′′ permits hood bracket 32 ′′ to move upwardly and rearwardly while deploy bracket 34 ′′ is prevented from moving about its pivot point 29 ′′ or coupling with body bracket 32 ′′′.
- the active hinge 14 ′′ is allowed to be positioned in an active pedestrian deployed position without during its movement interfering with surrounding sheet metal of the vehicle body 11 , which would be contacted by the deploy bracket 34 ′′ and possibly damaged or limit the range of motion of the active hinge 14 ′′ to its deployed position if allowed to move during an active pedestrian deployment position, for example with a configuration as shown in FIG. 23 and FIG.
- deploy bracket 34 ′′ pivots about pivot point 29 ′′ during an active deployment operation.
- pivoting of hood bracket 32 ′′ relative to deploy bracket 34 ′′ may cause hood 12 ′′ to interfere with an adjacent vehicle body 11 , such as a body panel, wiper or the like, as illustrated by travel of a trailing edge 15 ′′ of hood 14 ′′ along an travel path show as a phantom art, in one example.
- the active hinge 14 ′′ includes a hood bracket 32 ′′ that is pivotally connected to a deploy bracket 34 ′′.
- a pawl 80 ′′ is pivotally connected to the hood bracket 32 ′′.
- the pawl 80 ′′ is pivotable between a locked position and an unlocked position, for example in a manner as described herein above. While in the locked position, pivoting movement of the hood bracket 32 ′′ relative to the deploy bracket 34 ′′ is inhibited, and while in the unlocked position, pivoting movement of the hood bracket 32 ′′ relative to the deploy bracket 34 ′′ is permitted.
- FIG. 24 illustrates the hood bracket 32 ′′ in a closed, unpivoted positioned relative to the deploy bracket 34 ′′ and with the pawl 80 ′′ in the locked position.
- FIG. 25 illustrates the hood bracket 32 ′′ in an open, pivoted position relative to the deploy bracket 34 ′′ after the pawl 80 ′′ has been moved into the unlocked position.
- the deploy bracket is pivotally connected to a body bracket 30 ′′.
- hood edge 31 ′′ shows a possible interference between the hood edge 31 ′′ with a surrounding portion of the vehicle body 11 , such as a flare from a surrounding fender or of a fixed hood portion, as examples only, if hood 12 ′′ moves about pivot point 29 ′′, or in other words if the active hinge 14 ′′ provides for a pivoting of deploy bracket 34 ′′ about pivot point 29 ′′ during movement of the hood 12 ′′ to an active pedestrian deployment position.
- an active hinge 14 ′′′ includes a locking hook 116 ′′′ that is pivotally connected to the body bracket 30 ′′′.
- the hook 116 ′′′ presents an engagement flange 118 ′′′ that is positioned for removably engaging a tab 120 ′′′ of the deploy bracket 34 ′′′.
- the locking hook 116 ′′′ is pivotable between a first position in which the engagement flange 118 ′′′ is spaced from the tab 120 ′′′ thus allowing pivoting movement of the deploy bracket 34 ′′′ relative to the body bracket 32 ′′′, for example during a normal hood opening operation e.g.
- the locking hook 116 ′′′ further presents an actuation surface 122 ′′′ that is positioned in axial alignment with an actuator 100 ′′′.
- the portion of the actuation surface 122 ′′′ that is axially aligned with the actuator 100 ′′′ is radially spaced from the pivoting point 123 ′′ of the locking hook 116 ′′′′, illustratively provided on the body bracket 34 ′′′, which causes the locking hook 116 ′′′ to rotate in response to linear movement of the actuator 100 ′′′ to a position as shown in FIG. 29
- a linearly extendable contact member 102 ′′′ of the actuator 100 ′′′ is configured to move and engage the actuation surface 122 ′′′ of the locking hook 116 ′′′′ thus moving the locking hook 116 ′′′ into the second position and inhibiting pivoting of the deploy bracket 34 ′′′ relative to the body bracket 32 ′′′′ effectively locking the deploy bracket 34 ′′′ to the body bracket 32 ′′′.
- Locking hook 116 ′′′ is shown to include a recessed notch 115 ′′′ for assisting with the locking by engagement with the tab 120 ′′′, also referred to herein as an engagement feature, when moving the locking hook 116 ′′′ into the second position.
- Engagement feature may be a protruding pin, a stamped or folded portion of the bracket 34 ′′′ or a lug, or the like.
- the contact member 102 ′′′ moves the actuation surface 122 ′′′′ the actuation surface 122 ′′′ engages a contact face 98 ′′′ of the pawl 80 ′′′′ which causes the pawl 80 ′′′ to rotate from the locked position toward the locked position.
- the locking hook 116 ′′′ has rotated enough such that it clears the contact member 102 ′′′.
- the contact member 102 ′′′′ directly engages and pushes on a contact surface 124 ′′′ of the hood bracket 32 ′′′.
- the pawl 80 ′′′ has rotated into the unlocked position, thus allowing pivoting movement of the hood bracket 32 ′′′ relative to the secondary lever 113 ′′′, and pivoting movement of the secondary lever 113 ′′′ relative to the body bracket 30 ′′′. Because the deploy bracket 34 ′′′ is inhibited from moving at this time by the locking hook 116 ′′′′, and because the secondary lever 114 ′′′ is pivotable connected to the deploy bracket 23 ′′′ at a location that is spaced from where the deploy bracket 23 ′′′ is coupled with the body bracket 34 ′′′′ the hood bracket 32 ′′′ (and hood 12 ′′′) may move in an upward and rearward direction relative to the body bracket 30 ′′′′ as best illustrated in FIGS. 40 and 41 .
- the deploy bracket 23 ′′′ remains stationary and does not move upwards or rearwards during movement of the hood bracket 32 ′′′ during an occurrence of a pedestrian collision, damage and interference with body panels and/or wiper motors, wiper linkages, etc. is prevented. It should also be appreciated that prior to firing of the actuator 100 ′′′, the locking hook 116 ′′′ is in the first position with the engagement flange 118 ′′′ spaced from the tab 120 ′′′ thus allowing pivoting movement of the deploy bracket 34 ′′′ relative to the body bracket 32 ′ 41 and normal opening of the hood 12 ′′.
- an active hinge 14 ′′′ including a hood bracket 32 ′′′ for attachment to a vehicle hood 14 ′′', a body bracket 30 ′′' for attachment to a vehicle body 11 , a deploy bracket 34 ′′′ pivotally attached between the hood bracket 32 ′′′ and the body bracket 30 ′′′, the hood bracket 32 ′′′ being moveable relative to the body bracket 30 ′′′ between a non-deployed position and a deployed position, a locking hook 116 ′′′ pivotally mounted to one of the body bracket 30 ′′′ and the deploy bracket, and an engagement feature 120 ′′′ for engagement by the locking hook 116 ′′′, the engagement feature 120 ′′′ provided on another one of the body bracket 30 ′′′ and the deploy bracket 34 ′′, and further including an actuator 100 ′′′ for selectively pivoting the locking hook 116 ′′′ for engaging the locking hook 116 ′′′ with the engagement feature 120 ′′′ to prevent the deploy bracket 34 ′′′ from moving relative to the body bracket 30 .
- the engagement feature 120 ′′′ may be provided on the deploy bracket 34 ′′′ and the locking hook 116 ′′′ is pivotally mounted to the body bracket 30 ′′′, as illustratively shown in FIG. 28 .
- the deploy bracket 34 ′′′ may be pivotally mounted to the body bracket 30 ′′′ as illustratively shown in FIG. 27 .
- At least one link 129 ′′′, and one link shown in FIG. 41 for illustrative purposes, may be provided for pivotally coupling the hood bracket 32 ′′′ to the deploy bracket 34 ′′′, for example pivotally coupled to the deploy bracket 34 ′′′ at pivot 31 ′′′ and to the hood bracket 32 ′′′ at pivot 131 ′′.
- a pivot point 29 ′′′ of the deploy bracket 34 ′′′ relative to the body bracket 30 ′′′ is offset from the pivot point 31 ′′′ of the hood bracket 32 ′′′ relative to the deploy bracket 34 ′′′, to allow for example a different path of travel of the hood bracket 32 ′′′ during a normal operation for example when pivoting about pivot point 29 ′′′ as shown illustratively by phantom lines in FIG. 34 for example, and during an active pedestrian protection operation for example when pivoting about pivot point 31 ′′′ as shown illustratively by phantom lines in FIG. 41 .
- the hood bracket 32 ′′′ when moved from the non-deployed position ( FIG. 39 ) to the deployed position ( FIG.
- the locking hook 116 ′′′ includes a recessed notch 115 ′′′ ( FIG. 38 ) for receiving the engagement feature 120 ′′′when the engagement feature 120 ′′′ is engaged wit the locking hook 116 ′′′.
- the engagement feature 120 ′′′ may be projecting tab, such as tab 120 ′′′ formed with the deploy bracket 34 ′′′, and for example formed from a folded portion of the deploy bracket 34 ′′′ as shown.
- the active hinge 14 ′′′ may further include a pawl 80 ′′′ pivotally mounted to the hood bracket 32 ′′′ for releasable coupling, such as the compressible connection described herein above as an example, to the deploy bracket 34 ′′′ such that the actuator 10 ′′′ selectively pivots the pawl 80 ′′′′ for disengaging the pawl 80 ′′′′ from the deploy bracket 34 ′′′ ( FIG.
- the active hinge 14 ′′′ may further include a bolt 88 ′′′ for engagement by the pawl, the bolt 88 ′′′ connected the deploy bracket 34 ′′′, such that the pivoting of the pawl 80 ′′′ disengages the pawl from the bolt 88 ′′′ to releaseable decouple the pawl 80 ′′′′ from the deploy bracket 34 ′′′, in a manner as described herein above.
- the actuator 100 ′′′ may be configured to engage the locking hook 116 ′′′ before engaging the pawl 80 ′′′ (see sequence of FIGS. 36, 39 and 40 ).
- the actuator 100 ′′′ may be configured to drive the hood bracket 32 ′′′ relative to the body bracket 30 ′′′ in a vertical direction 777 and horizontal direction 888 to the deployed position (see FIG. 41 ) subsequent to the actuator 100 ′′′ pivoting the locking hook 116 ′′′ into engagement with the engagement feature 120 ′′′.
- the hood 12 ′′′ may avoid contact with the vehicle body 11 during an active pedestrian protection operation of the active hood hinge 14 ′′′, as shown in FIG. 41 .
- FIG. 42 in addition to the other Figures referred to herein, there is illustrated a method 3000 for assembling an active hinge, the method 3000 the steps of providing a hood bracket for attachment to a vehicle hood 3002 , providing a body bracket for attachment to a vehicle body 3004 , pivotally connecting a deploy bracket between the hood bracket and the body bracket 3006 , pivotally connecting a locking hook to one of the body bracket and the deploy bracket 3008 , providing an engagement feature on another one of the body bracket and the deploy bracket 3010 , and configuring the locking hook for pivoting into engagement with the engagement feature to prevent the deploy bracket from moving relative to the body bracket and for pivoting out of engagement with the engagement feature to permit the deploy bracket to move relative to the body bracket 3012 .
- the method 3000 further include providing an actuator for selectively pivoting the locking hook into engagement with the engagement feature.
- the method 3000 may further include pivotally connecting a pawl to the hood bracket, wherein the pawl defines a pocket, engaging the pawl with the deploy bracket to prevent the hood bracket to move from a non-deployed position to a deployed position, and configuring the pawl to disengage from the deploy bracket using the actuator to allow the hood bracket to move from the non-deployed position to the deployed position.
- the method 3000 may further include the step of configuring the actuator to engage the locking hook before engaging the pawl.
- the method 3000 may further include forming the engagement feature as a projecting tab with the one of the deploy bracket and the body bracket.
- the method 3000 may further include providing the engagement feature on the deploy bracket and pivotally mounting the locking hook to the body bracket.
- the method 3000 may further include pivotally mounting the deploy bracket to the body bracket about a pivot point.
- the method 3000 may further include coupling the hood bracket to the deploy bracket using at least one link, wherein the pivot point of the deploy bracket relative to the body bracket is offset from the pivot point of the hood bracket relative to the deploy bracket.
- the method 3000 may further include providing the lock hook with a recessed notch for receiving the engagement feature when the engagement feature is engaged with the locking hook.
- FIGS. 44-45 present a second embodiment of a pawl 80 A according to an aspect of the disclosure.
- the hook portion 84 A of the pawl 80 A is extended such that it surrounds more than half of the outer diameter of the safety bolt 88 to provide increased locking security while the pawl 80 A is positioned in the locked position.
- the contact face 98 A extends linearly away from a body portion 81 A by a length that is at least approximately one half of a maximum width W of the body portion 81 A. This provides a reduced actuator stroke length for moving the pawl 80 A from the locked to unlocked position.
- FIGS. 46-57 present a fifth embodiment of an active hinge 14 E.
- the active hinge 14 E includes a hood bracket 23 E for being connected to a hood of a vehicle, and a deploy bracket 34 E that is pivotally connected to the hood bracket 23 E at end portions of the hood bracket 23 E and deploy bracket 34 E.
- the hood bracket 23 E defines an elongated slot 74 E that receives a sliding pin 72 E that is connected to the deploy bracket 34 E for limiting pivoting movement of the hood bracket 23 E relative to the deploy bracket 34 E.
- a pawl 80 E is pivotally connected to the hood bracket 23 E along a shear bolt 85 E.
- the pawl 80 E defines a shear slot 87 E which receives the shear bolt 85 E.
- the sheer slot 87 E is larger than a diameter of the sheer bolt 85 E, thus allowing the pawl 80 E to be moved relative to the shear bolt 85 E during assembly of the active hinge 14 E.
- the pawl 80 E is pivotable between a locked position in which a hook portion 84 E of the pawl 80 E engages a safety bolt 88 E to prevent movement of the hood bracket 23 E relative to the deploy bracket 34 E and an unlocked position in which the pawl 80 E is spaced from the safety bolt 88 E to allow movement of the hood bracket 23 E relative to the deploy bracket 34 E.
- a shear screw 83 E is positioned adjacent to the safety bolt 88 E.
- the shear screw 83 E is integrally formed with the hook portion 84 E with a predetermined thickness such that a predetermined minimum force provided against a contact face 98 E of the pawl 80 E will cause the connection between the shear screw 83 E and contact face 98 E to break, thus allowing rotation of the pawl 80 E.
- FIG. 46 during ordinary usage, minor forces against the pawl 80 E will not cause the connection between the shear screw 83 E and contact face 98 E to break, however, as shown in FIGS. 47-48 , during a collision event which causes a force to be applied against the contact face 98 E of the pawl 80 E, a sufficient force is applied to break the connection between the shear screw 83 E and the contact face 98 E.
- the shear screw 83 E and contact face 98 E of the pawl 80 E may be connected to one another in other ways to provide the predetermined minimum breaking force.
- Steps for assembling the fifth embodiment of the active hinge 14 E are shown in FIGS. 49-57 .
- the shear screw 83 E, pawl 80 E and shear bolt 85 E are fixed to the hood bracket 23 E.
- the hood bracket 23 E is loosely coupled to the deploy bracket 34 E by positioning the hook portion 84 E of the pawl 80 E about a safety bolt 88 E that is fixed to the deploy bracket 34 E.
- the hood bracket 23 E is postioned at an angle relative to the deploy bracket 34 E.
- assembly continues by rotating the hood bracket 23 E about the safety bolt 88 E, downwardly toward the deploy bracket 34 E.
- FIG. 49 first, the shear screw 83 E, pawl 80 E and shear bolt 85 E are fixed to the hood bracket 23 E.
- the hood bracket 23 E is loosely coupled to the deploy bracket 34 E by positioning the hook portion 84 E of the pawl 80 E about a safety bolt 88 E that is fixed to the deploy bracket 34 E.
- assembly continues by aligning the hood bracket 23 E relative to the deploy bracket 34 E such that a pivot holes 98 E of the hood bracket 23 E and deploy bracket 34 E are positioned in alignment with one another, and such that the shear slot 87 E of the hood bracket 23 E is in alignment with a shear orifice 91 E of the deploy bracket 34 E.
- the method continues with installing a pivot rivet 93 E in the pivot holes 89 E, and inserting the shear bolt 85 E through the shear slot 87 E and the shear orifice 91 E to connect the hood bracket 23 E and the deploy bracket 34 E.
- FIG. 49 the method continues with installing a pivot rivet 93 E in the pivot holes 89 E, and inserting the shear bolt 85 E through the shear slot 87 E and the shear orifice 91 E to connect the hood bracket 23 E and the deploy bracket 34 E.
- assembly continues with loosening the shear screw 83 E, sliding the pawl 80 E toward the safety bolt 88 E, and tightening the shear screw to 12 Nm of torque in order to fix the pawl about the safety bolt 88 E at a desired fit.
- assembly further includes compressing the safety bolt 88 E in an axial direction as previously described in order to securely fit the components of the active hinge 14 E.
- FIGS. 60-61 disclose an improved assembly and method for fixing an actuator 100 F of a seventh embodiment of an active hinge 14 F to a vehicle body component 126 F according to an aspect of the disclosure.
- the active hinge 14 F includes a hood bracket 23 F for being connected to a hood of a vehicle and a deploy bracket 34 F that is pivotally connected to the hood bracket 23 F.
- the deploy bracket 34 F is pivotally connected to a body bracket 126 F via a pair of links 30 F.
- a pawl 80 F is pivotally connected to the hood bracket 23 F and is moveable between an unlocked position in which it is spaced from a safety bolt 88 F that is fixed to the deploy bracket 34 F for allowing relative movement between the hood bracket 23 F and the deploy bracket 34 F, and a locked position in which the pawl 80 F engages the safety bolt 88 F for inhibiting relative movement between the hood bracket 23 F and the deploy bracket 34 F.
- the body bracket 126 F includes a pair of mounting brackets 128 F that are integrally formed in the sheet metal which makes up the body bracket 126 F.
- the body bracket 126 F includes a generally planar base portion 130 F.
- Each of the mounting brackets 128 F include a protrusion portion 132 F that protrudes convexly from the base portion 130 F and terminates at a fixing tab 134 F.
- the protrusion portions 132 F overly a pair of mounting openings 136 F.
- the actuator 100 F includes a pair of actuator brackets 138 F that are each configured to be received between the base portion 130 F and the protrusion portion 132 F and fixing tab 134 F of one of the mounting brackets 128 F in order to align and secure the actuator 100 F into a desired position relative to the body component 126 F. It should be appreciated that mounting the actuator 100 F in this manner advantageously allows the actuator 100 F to be aligned and secured to the body bracket 126 F without the use of bolts or other separate fastening components.
- the body bracket 126 F further includes a support 140 F that protrudes outwardly relative to the base portion 130 F at a location that is positioned below the actuator brackets 138 F. The support 140 F aligns and supports a tube portion of the actuator 100 F to provide improved stability to the actuator 100 F.
- FIGS. 62-63F disclose an eighth embodiment of an active hinge 14 G.
- the active hinge 14 G includes a hood bracket 23 G for being connected to a hood of a vehicle and a deploy bracket 34 G that is pivotally connected to the hood bracket 23 G.
- the deploy bracket 34 G is pivotally connected to a body bracket 30 G by a pivot linkage mechanism 36 G, 38 G.
- the pivot linkage mechanism 36 G, 38 G includes a first link 36 G and a second link 38 G arranged to define a four-bar linkage.
- the first link 36 G has one end pivotally connected to the body bracket 30 G and its opposite end pivotally connected to the deploy bracket 34 G.
- a second link 38 G has a first end pivotally connected to the body bracket 30 G and a second end pivotally connected to the deploy bracket 34 G.
- the hood bracket 23 G defines an elongated slot 74 G that receives a sliding pin 72 G that is connected to the deploy bracket 34 G for limiting pivoting movement of the hood bracket 23 G relative to the deploy bracket 34 G.
- a pawl 80 G is pivotally connected to the hood bracket 23 G (or deploy bracket 34 G) along a fifth pin 82 G and includes a hook portion 84 G that defines a lower pocket 86 G.
- the hook portion 84 G is spaced from the fifth pin 82 G.
- a safety bolt 88 G is fixed to the deploy bracket 34 G (or hood bracket 23 G).
- the hook portion 84 G of the pawl 80 G is configured to partially surround the safety bolt 88 G while the pawl 80 G is positioned in a locked position to inhibit pivoting of the hood bracket 32 G relative to the deploy bracket 34 G about a third pivot pin 70 G.
- An actuator 100 G is positioned in alignment with a contact face 98 G of pawl 80 G.
- the contact face 98 G is spaced from the hook portion 84 G.
- the actuator 100 G includes a linearly extendable contact member 102 G for engaging the contact face 98 G to cause the pawl 80 G to rotate about the fifth pin 82 G from the locked position into an unlocked position (illustrated in FIGS. 59C-59F ). Rotating the pawl 80 G into the unlocked position allows the hood bracket 32 G to pivot about the third pivot pin 70 G relative to the deploy bracket 34 G.
- the contact member 102 G of the actuator 100 G When actuated, the contact member 102 G of the actuator 100 G also engages a shelf 101 G of the deploy bracket 34 G to cause the deploy bracket 34 G and hood bracket 23 G to move upwardly relative to the body bracket 30 G by way of the first and second links 36 G, 38 G.
- the actuator 100 G is configured to selectively actuate in response to a control signal being provided by a controller 104 G associated with an active passenger protection control system 106 G in response to one or more vehicle-mounted sensors 108 G or other detection devices detecting the occurrence of a pedestrian collision.
- the active hinge 14 G further includes at least one locking element 150 G, 154 G, 152 G that is configured to limit upward movement of the hood bracket 23 G relative to the body bracket 34 G after the actuator 100 G has been actuated during a collision event, and for inhibiting upward and downward movement of the hood bracket 23 G after deployment of the active hinge 14 G.
- the at least one locking element 150 G, 154 G, 152 G has an unlocked state for allowing the movement of the hood bracket 23 G relative to the body bracket 34 G and a locked state to limit or restrict movement of the hood bracket 23 G relative to the body bracket 34 G.
- the locking element 150 G, 154 G, 152 G includes a locking contour 150 G, a first locking element 154 G and a second locking element 152 G.
- the locking contour 150 G extends upwardly from a top surface of the body bracket 30 G.
- the locking contour 150 G general has a hook shape and defines a pocket 156 G.
- the second locking element 152 G is rotatably fixed to the pawl 80 G along the fifth pin 82 G.
- the second locking element 152 G extends radially outwardly from the fifth pin 82 G.
- the first locking element 154 G is pivotally connected to the deploy bracket 34 G along a sixth pivot pin 158 G.
- the first locking element 154 G generally has an L-shape and has a first leg 160 G and a second leg 162 G that meet at the sixth pivot pin 158 G.
- the first leg 160 G terminates at a tab 161 G that extends generally perpendicularly to the rest of the first leg 160 G
- the second leg 162 G terminates at a lip 166 G that extends perpendicularly to the rest of the second leg 162 G.
- a biasing mechanism 164 G such as a torsion spring, biases the first locking element 154 G in a counter-clockwise direction.
- FIG. 63A presents the active hinge 14 G in an initial, closed position.
- the pawl 80 G is in the locked position, and the second locking element 152 G is rotationally aligned with, and engages the tab 161 G of the first leg 160 G of the first locking element 154 G.
- the first locking element 154 G is biased against the second locking element 152 G, which prevents rotation of the first locking element 154 G relative to the second locking element 152 G.
- FIG. 63B presents the active hinge 14 G after initial firing of the actuator 100 G.
- the contact member 102 G of the actuator 100 G has engaged the contact face 98 G of the pawl 80 G, thus causing counter-clockwise rotation of the pawl 80 G and second locking element 152 G about the fifth pivot pin 82 G.
- This causes the second locking element 152 G to be positioned rotationally out of alignment with the first leg 160 G of the first locking element 154 G, thereby allowing the first locking element 154 G to rotate counter-clockwise about the sixth pivot pin 158 G to a point at which the second leg 162 G of the first locking element 154 G engages an outer surface 168 G of the body bracket 30 G. It should be appreciated that this initial movement of the second locking element 152 G occurs prior to movement of the deploy bracket 34 G relative to the body bracket 30 G.
- FIG. 63C presents the active hinge 14 G after the pawl 80 G has been rotated completely out of alignment with the safety bolt 88 G.
- the second locking element 152 G has rotated to a fully unlocked position in which it engages the safety bolt 88 G.
- the actuator 100 G has started causing upward movement of the deploy bracket 34 G relative to the body bracket 30 G.
- FIG. 63D presents the active hinge 14 G after the deploy bracket 34 G has moved upwardly to a certain degree relative to the body bracket 30 G. As shown, during this upward movement, the second leg 162 G follows a radius of the outer surface 168 G of the body bracket 30 G because it is biased against the outer surface 168 G.
- FIG. 63E presents the active hinge 14 G after the deploy bracket 34 G has moved upwardly relative to the body bracket 30 G to a point at which the lip 166 G of the second leg 162 G of the first locking element 154 G is caught in the pocket 156 G of the locking contour 150 G in an inhibiting position. At this point, the locking contour 150 G inhibits the deploy bracket 34 G, and hood bracket 23 G/hood, from moving upwardly any further. It should be appreciated that this allows the extent of movement of the hood to be limited to a predetermined extent to provide increased safety.
- FIG. 63F presents the active hinge 14 G in a scenario in which a downward force is applied against the hood. As shown, movement of the deploy bracket 34 G is inhibited because the lip 166 G engages a bottom surface of the locking contour 150 G inside the pocket 156 G. As such, locking element 150 G, 154 G, 152 G inhibits upward and downward movement of the hood bracket 23 G after deployment of the active hinge 14 G.
- FIGS. 64A and 64B present an alternate embodiment of the first locking element 154 H which includes a lowering feature 170 H, 172 H which allows for a degree of downward movement of the hood during the application of a downward force against the hood after the actuator 100 G has been actuated, such as during a collision event.
- the lowering feature 180 H, 172 H includes an opening 170 H that is defined between the second leg 162 H 0 and the lip 166 H.
- the lowering feature 180 H, 172 H further includes a pair of deformation legs 172 H which are defined on opposite sides of the opening 170 H.
- the deformation legs 172 H allow a degree of deformation of the first locking element 154 H along the deformation legs 172 H during the application of a downward force against the hood. Locking element 154 therefore may be shifted to an unlocked state as a result of such an application of force, for example shifted into a state which allows downward movement of the hood. It should be appreciated that the size and thickness of the deformation legs 172 H may be tuned to allow a predetermined amount of such deformation. This can advantageously provide increased safety because the deformation legs 172 H can be tuned to allow for deformation/collapsing of the hood in response to a specific predetermined force, such as that experienced during impact of a pedestrian's head against the hood.
- FIG. 65 presents an alternative embodiment of a lowering feature 174 H of the locking contour 150 H which also allows for a degree of downward movement of the hood during the application of a downward force against the hood after the actuator 100 G has been actuated.
- the lowering feature 174 H includes a channel portion 174 H defined by the pocket 156 H which extends further into the locking contour 150 H than the rest of the pocket 156 H. According to this embodiment, after the actuator 100 G has been fired, the lip 166 G is rotated into the channel portion 174 H.
- the lip 166 G Upon the application of a downward force against the hood, due to a radius of the channel portion 174 H, the lip 166 G is able to slide downwardly out of the channel portion 174 H, thus allowing a degree of downward movement of the hood.
- the channel portion 174 H may be shaped and sized to allow for a predetermined amount of movement. Again, this feature can advantageously provide increased safety because the channel portion 174 H can be tuned to allow for deformation/collapsing of the hood in response to a specific predetermined force, such as that experienced during impact of a pedestrian's head against the hood.
- first and second locking elements and locking contour may similarly be incorporated into one-joint active hinge designs.
- FIG. 66 A method of operating an active hinge 14 G per the teachings of the eighth embodiment of the activate hinge 14 G is illustrated in FIG. 66 .
- the method includes 4000 providing the hood bracket 23 G, the body bracket 30 G, the deploy bracket 34 G, the pawl 80 G and the bolt 88 G.
- the method may further include 4002 actuating the actuator 100 G in response to a detection of a collision event, wherein the actuator moves the pawl 80 G from a locked position in which the pawl 80 G engages the bolt 88 G to fix the hood bracket 23 G relative to the deploy bracket 34 G, to an unlocked position in which the pawl 80 G is spaced from the bolt 88 G allowing relative movement between the hood bracket 23 G and the deploy bracket 34 G and body bracket 30 G.
- the method may further include 4004 stopping movement of the hood bracket 23 G relative to the body bracket 30 G with the locking element 150 G, 154 G, 152 G after the hood bracket 23 G has moved a predetermined distance relative to the body bracket 30 G.
- This step may include 4006 receiving the first locking element 154 G in the locking contour 150 G after the hood bracket 23 G has moved the predetermined distance relative to the body bracket 30 G.
- This step may further include 4008 biasing the first locking element 154 G toward the locking contour 150 G with a biasing mechanism 156 G.
- This step may further include 4010 preventing rotation of the first locking element 154 G, such as with the second locking element 152 G, until the pawl is rotated into the unlocked position from the locked position.
- the method may further include 4012 moving the hood bracket 23 G relative to the body bracket 30 G with the actuator 100 G after moving the pawl 80 G from the locked position to the unlocked position until movement of the hood bracket 23 G is stopped by the locking element 150 G, 154 G, 152 G. This may occur by engaging the actuator 100 G against the shelf 101 G of the hood bracket 23 G.
- the method may further include 4014 inhibiting upward and downward movement of the hood bracket 23 G with the locking element 150 G, 154 G, 152 G after movement of the hood bracket 23 G is stopped by the locking element 150 G, 154 G, 152 G.
- the method may further include 4016 the step of moving the hood bracket 23 G downward to predetermined extent with the lowering feature 170 H, 172 H during the application of a downward force against the hood after the actuator 100 G has been actuated, such as during a collision event.
- first, second, third, etc. may be used herein to described various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as “first,” “second,” and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.
- Spatially relative terms such as “inner,” “outer,” “beneath,” “below,” “lower,” “above,” “upper,” and the like, may be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. Spatially relative terms may be intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as “below” or “beneath” other elements or features would then be oriented “above” the other elements or features. Thus, the example term “below” can encompass both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
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Abstract
An active hinge including a hood bracket for attachment to a vehicle hood, a body bracket for attachment to a vehicle body, and a deploy bracket pivotally connected to the hood bracket and the body bracket. A pawl is pivotally connected to one of the hood bracket and the deploy bracket. A bolt is fixed to one of the hood bracket and the deploy bracket. The pawl is moveable between an unlocked position in which the pawl is spaced from the bolt, and a locked position wherein the pawl engages the bolt to fix the hood bracket to the deploy bracket. An actuator is configured to move the locking hook from the first to the second position and to cause the hood bracket to move. At least one locking element limits movement of the hood bracket relative to the body bracket.
Description
- This PCT International Patent Application claims the benefit and priority to U.S. Provisional Patent Application Ser. No. 62/834,329, filed on Apr. 15, 2019, the entire disclosure of which is incorporated herein by reference.
- The present disclosure relates generally to pedestrian protection systems for motor vehicles of the type having a deployable hood assembly equipped with active hinges. More particularly, the present disclosure is directed to an active hinge for use with a deployable hood assembly and which has locking element which limits movement of a hood bracket relative to a body bracket.
- This section provides background information related to the present disclosure which is not necessarily prior art.
- In recent years, a great deal of emphasis has been directed to development of pedestrian protection systems for use in motor vehicles in an effort to reduce the likelihood or severity of injuries caused during a collision between a pedestrian and a motor vehicle. One such area of development has been directed to equipping the motor vehicle with a hood assembly capable of absorbing impact forces.
- A “passive” pedestrian protection system associated with the hood assembly includes providing a pocket of under-hood crush space between the hood and the components within the vehicle's engine compartment. This crush space is configured to reduce the chance of bodily impact with the components within the engine component and, more particularly, to provide an impact absorbing feature. However, the use of low profile hoods in modern motor vehicles for improved aesthetics and aerodynamics, in combination with smaller engine compartments, limits the available crush space.
- As an alternative, an “active” pedestrian protection system associated with the vehicle's hood assembly provides a “deployable” hood that is configured to raise a rear portion of the latched hood to create the additional under-hood crush space. This deployable hood feature is activated in response to detection of a pedestrian collision with the front end of the motor vehicle. Typically, a pair of active hinges are incorporated into the hood assembly. Each active hinge includes a pivot linkage interconnecting the hood to the vehicle body and an actuator that is operable to forcibly move the pivot linkage for causing the hood to move from a non-deployed position to a deployed position in response to detection of the pedestrian impact. Examples of active hinges that provide this functionality are disclosed in commonly-owned U.S. Pat. No. 8,544,590 and U.S. Publication No. 2014/0182962.
- There remains a need for further improvements to such active hinges.
- This section provides a general summary of the disclosure and is not intended to be interpreted as a comprehensive listing of its full scope or of all of its objects, aspects, features and/or advantages.
- It is an aspect of the present disclosure to provide an active hinge that is simple in design, uses few components, and is inexpensive to manufacture and incorporate into vehicles.
- It is another aspect of the present disclosure to provide an active hinge that limits movement of a hood of a vehicle during deployment of the active hinge during a collision event, and which inhibits movement of the hood in upward and downward directions after deployment of the active hinge.
- In accordance with these and other aspects of the present disclosure, an active hinge is provided. The active hinge includes a hood bracket for attachment to a vehicle hood, a body bracket for attachment to a vehicle body, and a deploy bracket pivotally connected to the hood bracket and the body bracket. A pawl is pivotally connected to the hood bracket. A bolt is fixed to the deploy bracket. The pawl is moveable between a locked position wherein the pawl engages the bolt to fix the hood bracket relative to the deploy bracket, and an unlocked position in which the pawl is spaced from the bolt which allows relative movement between the hood bracket and the deploy bracket. An actuator is configured to move the pawl from the locked position to the unlocked position and to cause the hood bracket to move relative to the body bracket in response to a detection of a collision event. At least one locking element limits movement of the hood bracket relative to the body bracket.
- According to another aspect of the disclosure, a method of operating an active hinge of a vehicle during a collision event is provided. The method includes providing a hood bracket for attachment to a vehicle hood. The method also includes providing a body bracket for attachment to a vehicle body. The method also includes providing a deploy bracket pivotally connected to the hood bracket and the body bracket. The method further includes providing a pawl that is pivotally connected to the hood bracket. The method also includes providing a bolt that is fixed to the deploy bracket. The method also includes actuating an actuator in response to a detection of the collision event, wherein the actuator moves the pawl from a locked position in which the pawl engages the bolt to fix the hood bracket relative to the deploy bracket, to an unlocked position in which the pawl is spaced from the bolt allowing relative movement between the hood bracket and the deploy bracket. The method further includes inhibiting movement of the hood bracket relative to the body bracket with a locking element after the hood bracket has moved a predetermined distance relative to the body bracket.
- According to another aspect of the disclosure, an active hinge is provided. The active hinge includes a hood bracket for attachment to a vehicle hood, a body bracket for attachment to a vehicle body, and a deploy bracket pivotally connected to the hood bracket and the body bracket. A locking mechanism releasably couples the hood bracket and the deploy bracket. The locking mechanism comprises a locked state to fix the hood bracket relative to the deploy bracket, and an unlocked state to allow relative movement between the hood bracket and the deploy bracket. At least one locking element limits movement of the hood bracket relative to the body bracket.
- Further areas of applicability will become apparent from the description provided. The description and specific examples in this summary are intended for purposes of illustration only and are not intended to limit the scope of the present disclosure.
- The drawings described herein are for illustrative purposes only of selected embodiments and not all possible implementations thereof such that the drawings are not intended to limit the scope of the present disclosure.
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FIG. 1 is a first side front perspective view of a vehicle hood assembly having a hood and an active hinge constructed in accordance with the present disclosure and showing the vehicle hood assembly located in a normal-closed position with the hood in a latched condition and the active hinge in a non-deployed condition; -
FIG. 2 is a similar first side perspective view asFIG. 1 , now showing the vehicle hood assembly in a deployed position with the hood maintained in its latched condition and its rear edge segment raised and with the active hinge in a deployed condition; -
FIG. 3 is a first side view of a first example embodiment of an active hinge illustrating a pawl in a locked position and a hood bracket in a non-deployed position; -
FIG. 4 is a second side view of the first example embodiment of an active hinge illustrating the pawl in the locked position and the hood bracket in a non-deployed position; -
FIG. 5 is a magnified first side view of a hood bracket and deploy bracket of the first example embodiment of an active hinge illustrating the pawl in the locked position and the hood bracket in a non-deployed position, and further illustrating an actuator for rotating the pawl; -
FIG. 6 is a front perspective view of the first example embodiment of an active hinge illustrating the pawl in the locked position and the hood bracket in a non-deployed position; -
FIG. 7 is a magnified view of the pawl and a bolt ofFIG. 6 ; -
FIG. 7A is a side cross-sectional view of the bolt ofFIG. 6 ; -
FIG. 8 is a magnified view of the hood bracket, deploy bracket, pawl and bolt ofFIG. 1 , illustrating rotation of the pawl from a locked position to an unlocked position in response to engagement by an actuator; -
FIG. 9 is a first side view of the pawl of the first example embodiment of an active hinge; -
FIG. 10A is a side schematic view illustrating a safety bolt positioned against a bracket and received by a pocket of a pawl prior to applying a compressive axial force to the safety bolt; -
FIG. 10B is a side schematic view illustrating the safety bolt ofFIG. 10A after a compressive axial force has been applied to the safety bolt; -
FIG. 10C is a side schematic view illustrating the safety bolt ofFIG. 10A after a compressive axial force has been applied to the safety bolt; -
FIG. 11 is a flow diagram illustrating a method of aligning a safety bolt relative to a bracket and pawl and applying a compressive force to the safety bolt; -
FIG. 12 is a first side perspective view of a second example embodiment of an active hinge illustrating a pawl in a locked position and a hood bracket in a non-deployed position; -
FIG. 13 is a first side perspective view of the second example embodiment of an active hinge illustrating the pawl in the locked position and the hood bracket in the non-deployed position, and not including the actuator; -
FIG. 14 is a magnified view of the pawl and a bolt ofFIG. 11 ; -
FIG. 15 is a first side perspective view of the second example embodiment of an active hinge illustrating the pawl in an locked position and the hood bracket in the non-deployed position; -
FIG. 16 is a first side perspective view of the second example embodiment of an active hinge illustrating the pawl in a locked position and the hood bracket in the non-deployed position, and not including the actuator; -
FIG. 17 is a first side perspective view of the second example embodiment of an active hinge illustrating the pawl in an locked position and the hood bracket in a deployed position; -
FIG. 18 is a first side perspective view of the second example embodiment of an active hinge illustrating the pawl in an locked position and the hood bracket in a deployed position, and not including the actuator; -
FIG. 19 is a first side view of a third example embodiment of a pawl having an extended hook portion and contact face; and -
FIG. 20 is another first side view of the third example embodiment of a pawl having an extended hook portion and contact face. -
FIG. 21A is a schematic diagram of an active hinge having a locking mechanism in a locked state, in accordance with an illustrative embodiment; -
FIG. 21B is a schematic diagram of an active hinge ofFIG. 21A having a locking mechanism in an unlocked state, in accordance with an illustrative embodiment; -
FIG. 22A is a schematic diagram of an active hinge having a linearly moveable locking mechanism in a locked state, in accordance with an illustrative embodiment; -
FIG. 22B is a schematic diagram of an active hinge ofFIG. 22A having a linearly moveable locking mechanism in an unlocked state, in accordance with an illustrative embodiment; -
FIG. 23 is a perspective view of a deploy bracket, body bracket, hood bracket and pawl of a third example embodiment of an active hinge illustrating that the deploy bracket is unable to move upward and rearward in some arrangements due to interference from vehicle components and body metal; -
FIG. 24 is a first side perspective view of a hood bracket in a closed position relative to a deploy bracket of the third example embodiment of an active hinge; -
FIG. 25 is a first side perspective view of a hood bracket in an open position relative to a deploy bracket of the third example embodiment of an active hinge; -
FIG. 26 is a first side perspective view of the third example embodiment of an active hinge moving a hood in an upward and forward position, which may cause interference with a part of a vehicle body; -
FIG. 27 is a first side perspective view of a fourth example embodiment of an active hinge; -
FIG. 28 is a second side perspective view of the fourth example embodiment of an active hinge; -
FIG. 29 is another first side perspective view of the fourth example embodiment of an active hinge; -
FIG. 30 is another first side perspective view of the fourth example embodiment of an active hinge; -
FIG. 31 is a magnified view of an actuator and locking hook ofFIG. 30 ; -
FIG. 32 is a magnified view of a hood bracket, deploy bracket, pawl, actuator and locking hook ofFIG. 30 ; -
FIG. 33 is a second side perspective view of the locking hook of the fourth example embodiment of an active hinge, illustrating pivoting of the locking hook; -
FIG. 34 is another first side perspective view of the fourth example embodiment of an active hinge illustrating a path of motion of the hood bracket during a normal pivoting, or non-active pedestrian protection operation, of the hood bracket; -
FIG. 35 is a magnified view of the locking hook and actuator ofFIG. 33 ; -
FIG. 36 is a magnified view of a hood bracket, deploy bracket, pawl, locking hook and actuator ofFIG. 31 ; -
FIG. 37 is another second side perspective view of the locking hook of the fourth example embodiment of an active hinge, illustrating pivoting of the locking hook into alignment with a tab of the deploy bracket; -
FIG. 38 is another second side perspective view of the locking hook of the fourth example embodiment of an active hinge, illustrating pivoting of the locking hook into alignment with a tab of the deploy bracket; -
FIG. 39 is a second side perspective view of the actuator engaging a contact surface of the hood bracket of the fourth example embodiment of an active hinge, illustrating pivoting movement of the locking hook and the hood bracket and the pawl in response to engagement with an actuator; -
FIG. 40 is a first side perspective view of the actuator providing movement of the hood bracket relative to the deploy bracket of the fourth embodiment of an active hinge, illustrating the deploy bracket fixed in place relative to the body bracket by the locking hook; -
FIG. 41 is a first side perspective view of the actuator providing further movement of the hood bracket relative to the deploy bracket of the fourth embodiment of an active hinge, illustrating the deploy bracket fixed in place relative to the body bracket by the locking hook; -
FIG. 42 is a flow chart of a method for assembling an active hinge for a motor vehicle, in accordance with an illustrative embodiment; -
FIG. 43 is a first side view of a first example embodiment of a pawl; -
FIG. 44 is a first side view of a second example embodiment of a pawl having an extended hook portion and contact face; -
FIG. 45 is another first side view of the second example embodiment of a pawl having an extended hook portion and contact face; -
FIG. 46 is a first side view of a pawl of a fifth example embodiment of an active hinge, illustrating the pawl during ordinary usage; -
FIG. 47 is another first side view of the pawl of the fifth example embodiment of the active hinge, illustrating initial activation of an actuator in response to the detection of a collision event; -
FIG. 48 is another first side view of the pawl of the fifth example embodiment of the active hinge, illustrating breaking of a connection between the pawl and a shear screw in response to actuation of the actuator and rotation of the pawl; -
FIGS. 49-57 are perspective views of the fifth example embodiment of an active hinge, illustrating assembly of the active hinge; -
FIGS. 58-59 are first side perspective views of a sixth example embodiment of an active hinge, illustrating how an actuator of the active hinge is mounted to a body component of the vehicle; -
FIGS. 60-61 are first side perspective views of a seventh example embodiment of an active hinge, illustrating how an actuator of the active hinge is mounted to a body component of a vehicle; -
FIGS. 62-63F are first side views of an eight example embodiment of an active hinge illustrating various stages of deployment of the active hinge and how a locking element limits movement of a hood bracket; -
FIG. 64A is a first side view of an alternative embodiment of a second locking leg of an active hinge which allows for deformation of the second locking leg during an application of a downward force against a hood of the vehicle; -
FIG. 64B is a perspective view of the second locking leg ofFIG. 64A ; -
FIG. 65 is a side view of the an alternative embodiment of a locking contour of an active hinge which allows for downward movement of a second locking leg during an application of a downward force against a hood of the vehicle; -
FIG. 66 is a flow diagram illustrating operation of the eight embodiment of the active hinge. - Corresponding reference numerals indicate corresponding parts throughout the several view of the drawings.
- Example embodiments of a vehicle hood assembly having a hood and at least one active hinge embodying the teachings of the present disclosure will now be described more fully with reference to the accompanying drawings. However, the example embodiments are only provided so that this disclosure will be thorough, and will fully convey the scope to those who are skilled in the art. Numerous specific details are set forth such as examples of specific components, devices, and methods, to provide a thorough understanding of embodiments of the present disclosure. It will be apparent to those skilled in the art that specific details need not be employed, that the example embodiments may be embodied in many different forms and that neither should be construed to limit the scope of the disclosure. In some example embodiments, well-known processes, well-known device structures, and well-known technologies are not described in detail.
- As will be detailed, the active hinges of the present disclosure are used as part of a hood assembly for a pedestrian protection system on motor vehicles. More specifically, active hinges of the type disclosed herein are used for mounting a vehicle hood to a vehicle body in an effort to introduce an additional degree of freedom in the movement of the vehicle's hood when a pedestrian is struck by the vehicle to reduce the severity of injuries sustained when the pedestrian contacts the vehicle's hood.
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FIG. 1 illustrates a side elevational view of avehicle hood assembly 10 generally configured to include ahood 12 and at least oneactive hinge 9. The term “vehicle” is intended to broadly encompass any car, truck, SUV, van or any other type of passenger carrying vehicle.Hood assembly 10 is configured to overlie an engine compartment of the vehicle, as defined by the vehicle's body.Hood 12 is shown to include afront segment 16, arear segment 18 and a pair of laterally-spacedside segments 20. As is conventional,front segment 16 ofhood 12 is configured to be located proximate to a front portion of the vehicle whilerear segment 18 ofhood 12 is configured to be located proximate to the vehicle's windshield. - In accordance with one example embodiment, a pair of active hinges 9 (only one shown) are associated with
hood assembly 10, each being located adjacent to one ofside segments 20 ofhood 12 and being configured to allowhood 12 to pivot between an open position withfront segment 16 elevated to provide access to engine compartment and a normal-closed position whereathood 12 is lowered to provide an unobstructed view for the person operating the vehicle.FIG. 1 illustratesactive hinge 9 positioned such thathood 12 pivots in proximity to itsrear segment 18. The vehicle is also equipped with ahood latching device 21 shown to include astriker 22 fixed to an underside portion offront segment 16 ofhood 12 and alatch 24 mounted to astructural portion 26 of the vehicle's body. In particular,FIG. 1 illustratesstriker 22 engaged and held bylatch 24 so as to locatedhood assembly 10 in its normal-closed position withactive hinge 9 maintained in a “non-deployed” condition, wherebyfront segment 16 of hood is latched andrear segment 18 ofhood 12 is located in its conventional lowered position. - As will be detailed,
active hinge 9 includes a pedestrian protection device that functions automatically in the event of a vehicle impact with a pedestrian. Specifically, the pedestrian protection device functions to shiftactive hinge 9 from its non-deployed state into a “deployed” condition, as shown inFIG. 2 , whererear segment 18 ofhood 12 is moved to a raised or deployed position whilefront segment 16 ofhood 12 remains latched via latchingdevice 21. Thus,active hinge 9 provides an additional degree of freedom in its movement to permitrear segment 18 ofhood 12 to move from its normal lowered position (FIG. 1 ) into its raised position (FIG. 2 ). As will also be detailed, under normal (i.e., pre-collision) situations, this additional degree of freedom is disabled by a primary latch of a latching mechanism associated withactive hinge 9 which, in turn, permits normal usage ofhood 12. Normal usage is understood to mean pivotal movement ofhood 12 between its normally-closed position ofFIG. 1 and a normally-opened position (not shown) withactive hinge 9 maintained in its non-deployed state. Release of the primary latch (via an actuator) functions to initiate shifting ofactive hinge 9 from its non-deployed state to its deployed state. -
FIGS. 3-9 present a first embodiment of anactive hinge 14 according to another aspect of the disclosure.FIG. 3 presents theactive hinge 14 in its non-deployed condition. Theactive hinge 14 generally includes abody bracket 30, ahood bracket 32, a deploybracket 34, and a pivot linkage mechanism interconnecting thebody bracket 30 and deploybracket 34. As best shown inFIG. 4 , the pivot linkage mechanism includes afirst link 36 and asecond link 38 arranged to define a four-bar linkage 40. Thefirst link 36 has one end pivotally connected to thebody bracket 30 via afirst pivot pin 60 and its opposite end pivotally connected to deploybracket 34 via asecond pivot pin 62. Similarly,second link 38 is shown having a first end pivotally connected tobody bracket 30 via afirst pivot pin 64 and its second end pivotally connected to deploybracket 34 via asecond pivot pin 66. Athird pivot pin 70 pivotally connects a terminal end segment of deploybracket 34 to thehood bracket 32. - With reference back to
FIG. 3 , afourth pin 72 further interconnects the deploybracket 34 and thehood bracket 32. Thefourth pin 72 is spaced from thethird pivot pin 70 along thehood bracket 32. Thehood bracket 32 defines anelongated slot 74 that receives thefourth pin 72. The slot extends between afirst end 76 and asecond end 78. During pivoting of thehood bracket 32 relative to the deploybracket 34 about thethird pivot pin 70, thefourth pin 72 slides between, and is limited in movement by the first and second ends 76, 78 of theslot 74 to limit the rotational range of thehood bracket 32 relative to the deploybracket 34 between a deployed position in which thefourth pin 72 engages thesecond end 78 of theslot 74, and a non-deployed position in which thefourth pin 72 engages thefirst end 76 of theslot 74. - A
pawl 80, and example of a locking mechanism, is pivotally connected to thehood bracket 32 along afifth pin 82. Thepawl 80 acting as an illustrative type of moveable lever includes ahook portion 84 that has anengagement face 85 which defines alower pocket 86. Thehook portion 84 is spaced from thefifth pin 82. Asafety bolt 88 is fixed to the deploybracket 34. Thehook portion 84 of thepawl 80 is configured to partially surround abottom portion 90 of thesafety bolt 88, while thepawl 80 is positioned in a locked position (e.g., as shown inFIGS. 5-7 ), such that thesafety bolt 88 is received by thelower pocket 86 of thepawl 80 to inhibit pivoting of thehood bracket 32 relative to the deploybracket 34 about thethird pivot pin 70. More particularly, according to this embodiment, thelower pocket 86 surrounds approximately half of thesafety bolt 88. As best illustrated inFIG. 6 , thehood bracket 32 defines anupper pocket 92 that is configured to partially surround a top portion 91 of thesafety bolt 88 while thehood bracket 32 is in the non-deployed position. As best illustrated inFIGS. 6-7A , thesafety bolt 88 has a generally frusto-conical shape and tapers from awider portion 94 spaced from the deploybracket 34 to anarrower portion 96 coupled with and received by the deploybracket 34 along a taperedregion 35. Thewider portion 94 has a first diameter D1 that is larger than a second diameter D2 of thenarrower portion 96. According to an embodiment, during assembly of theactive hinge 14, thesafety bolt 88 initially has a generally cylindrical shape, and is riveted or otherwise coupled to the deploybracket 34 to provide an axial compressive force thereto, creating the tapered wall of thesafety bolt 88 to drive flared portion of the safety bolt against theengagement face 85 of thepawl 80 to establish a tensed relationship(s), where a movement of thepawl 80 due to the expanded bolt is prevented by the secured fixing of thepawl 80 about thepivot axis 82.Pawl 80 andsafety bolt 88 are an illustrative example of a locking mechanism having a locked state to releasably couple thehood bracket 32 and the deploybracket 34 together, such as for example when thepawl 80 andsafety bolt 88 are coupled to prevent the relative movement of thehood bracket 32 and the deploybracket 34, and an unlocked state such as for example when thepawl 80 andsafety bolt 88 are decoupled to allow the relative movement of thehood bracket 32 and the deploybracket 34. According to an embodiment, during assembly of theactive hinge 14, thesafety bolt 88 initially has a generally cylindrical shape, and is riveted or otherwise coupled to the deploybracket 34 to provide an axial compressive force thereto, creating the tapered wall of thesafety bolt 88 to drive thepawl 80 and deploybracket 34 in opposite directions from one another to fix thehood bracket 32 in the non-deployed position to establish tensed relationship(s). It should be appreciated that thesafety bolt 88 may have other tapered shapes, and the tapered shape may be provided in other ways. Tapered shapes may include a budging shape with a gradual reduction in thickness, or an abrupt reduction in thickness, or an uneven reduction in thickness. As illustrated inFIG. 9 , thehook portion 84 andlower pocket 86 of thepawl 80 generally have an arc shape with a radius of curvature that is sized such that the taperedsafety bolt 88 may be received and secured within thepocket 86 of thepawl 80. It should be appreciated that fixing thehood bracket 32 in the non-deployed position in this manner with the frustoconical shapedsafety bolt 88, and arc-shapedpocket 86 of thepawl 80 advantageously eliminate the need for a spring to hold thehood bracket 32 in the non-deployed position, and prevents noise, rattling and vibrations because the components of theactive hinge 14 are held in tension. Holding the components of theactive hinge 14 in tension in this manner also eliminates tolerances. Other types of locking mechanisms may be provided in tensed relationship with thebolt 88, such as a slidinglever 77 configured to linearly move having a protrusions for engaging thebolt 88, or a sliding mechanism having detents for engaging thebolt 88, or a rotating mechanism having detents for receiving a portion of the bolt 88 (see for exampleFIGS. 22A and 22B ), as examples and without limitation. - It should be appreciated that the
safety bolt 88 may be pre-compressed into position during early stages of manufacturing, or after all of the components of theactive hinge 14 are assembled and with thepawl 80 in the locked position. More particularly, as illustrated inFIGS. 10A-10B , during assembly of theactive hinge 14, thesafety bolt 88 is aligned with/positioned in thelower pocket 86 of the pawl 80 (FIG. 10A ). Subsequently, as shown inFIG. 10B , thesafety bolt 88 is axially crushed to form its frusto-conical shape, which causes thesafety bolt 88 to be locked within thepocket 86 of thepawl 80. As a result, any radial clearance between thesafety bolt 88 andpawl 80 is eliminated, therefore providing an anti-chucking effect. -
FIG. 11 presents a method of assembling theactive hinge 14 according to an aspect of the disclosure. The method includes 200 providing apawl 80 with a closing force vector configuration. The method continues with 202 axially aligning thepocket 86 of thepawl 80 with thesafety bolt 88. As will be clarified below, it should be appreciated that thepawl 80 andsafety bolt 88 may be attached to any of thebrackets links different brackets links safety bolt 88 when thepocket 86 of thepawl 80 is aligned with thesafety bolt 88 to expand thesafety bolt 88 and eliminate radial gaps between thesafety bolt 88 andpawl 80. - As best shown in
FIGS. 5 and 8-9 , thepawl 80 further includes acontact face 98 that is spaced from thefifth pin 82 and thehook portion 84 of thepawl 80. As shown, a first distance L1 between the pivotfifth pin 82 and theengagement face 85 is about twice that of a second distance L2 between thefifth pin 82 and thecontact face 98. Anactuator 100 is positioned in alignment with thecontact face 98. Theactuator 100 includes a linearlyextendable contact member 102 for engaging thecontact face 98 to cause thepawl 80 to rotate about thefifth pin 82 from the locked position into an unlocked position (illustrated inFIG. 8 ). Rotating thepawl 80 into the unlocked position allows thehood bracket 32 to pivot about thethird pivot pin 70 relative to the deploybracket 34 to allow thehood bracket 32 and hood to move into the deployed position. It should be appreciated that other components of the active 14 may be configured to move relative to one another in a similar manner in response to actuation of theactuator 100 or other actuators. As schematically illustrated inFIG. 5 , theactuator 100 is configured to selectively actuate in response to a control signal being provided by acontroller 104 associated with an active passengerprotection control system 106 in response to one or more vehicle-mountedsensors 108 or other detection devices detecting the occurrence of a pedestrian collision. In the example shown, theactuator 100 includes anelectrical connector 110 that would be in electrical connection with the sensor(s) 180 and/or thecontroller 104 such that an electrical control signal is generated to control actuation of theactuator 100. - It should be appreciated that a one-joint assembly may be utilized as an alternative to the four-
bar linkage 40 of the first embodiment of theactive hinge 14. -
FIGS. 12-18 disclose a second embodiment of anactive hinge 14′ according to another aspect of the disclosure. As best illustrated inFIG. 18 , similar to the first embodiment of anactive hinge 14, theactive hinge 14′ generally includes abody bracket 30′, ahood bracket 32′, a deploybracket 34′, and a pivot linkage mechanism interconnecting thebody bracket 30′ and deploybracket 34′. The pivot linkage mechanism includes afirst link 36′ and asecond link 38′ arranged to define a four-bar linkage 40′. Thefirst link 36′ has one end pivotally connected to thebody bracket 30′ via afirst pivot pin 60′ and its opposite end pivotally connected to the deploybracket 34′ via asecond pivot pin 62′. Similarly,second link 38′ is shown having a first end pivotally connected tobody bracket 30′ via afirst pivot pin 64′ and its second end pivotally connected to deploybracket 34 via asecond pivot pin 66′. Thesecond link 38′generally has an “L” shape and defines anelbow portion 69′ between first and secondlinear segments 71′, 72′ that extend generally perpendicularly to one another. Athird pivot pin 70′ pivotally connects a terminal end segment of deploybracket 34′ to thehood bracket 32′. - According to the second embodiment of the
active hinge 14′, there is no fourth pin andcorresponding slot 74 limiting pivoting movement of thehood bracket 32′ relative to the body bracket' about thethird pivot pin 70′ like in the first embodiment of theactive hinge 14. - A
pawl 80′ is pivotally connected to theelbow portion 69′ of the of thesecond link 38′ along afifth pivot pin 82′. Thepawl 80′ includes ahook portion 84′ that has anengagement face 85′ that defines alower pocket 86′. Thehook portion 84′ is spaced from thefifth pin 82′. Asafety bolt 88′ is fixed to thebody bracket 30′. Thelower pocket 86′ of thehook portion 84′ of thepawl 80′ is configured to partially surround abottom portion 90′ of thesafety bolt 88′, while thepawl 80′ is positioned in a locked position (e.g., as shown inFIGS. 12-14 ), such that thesafety bolt 88′ is received by thelower pocket 86′ of thepawl 80′ to inhibit pivoting of thesecond link 38′ and deploybracket 34′ relative to thebody bracket 30′ about thethird pivot pin 70′. Like the first embodiment of theactive hinge 14′, thesafety bolt 88′ has a generally frustoconical shape and tapers between awider portion 94′ spaced from thebody bracket 30′ to anarrower portion 96′ coupled with thebody bracket 30′. Thewider portion 94′ has a larger diameter than thenarrower portion 96′. During assembly of theactive hinge 14′, the safety bolt is riveted or otherwise connected to thebody bracket 30′ such that the tapered wall of thesafety bolt 88′ drives thepawl 80′ downwardly to fix the deploybracket 34′ in the non-deployed position relative to thebody bracket 30′. It should be appreciated that fixing the deploybracket 34′ in the non-deployed position in this manner with the frustoconicalshape safety bolt 88′ advantageously eliminates the need for a spring to hold the deploybracket 34′ in the non-deployed position and prevents noise, rattling and vibrations because the components of theactive hinge 14′ are held in tension. Holding the components of the active hinge in tension in this manner also eliminates tolerances. - It should also be appreciated that, according to either of the aforementioned embodiments, the
safety bolt active hinge pawl safety bolt active hinge safety bolt pawl active hinge safety bolt active hinge - The
pawl 80′ further includes acontact face 98′ that is spaced from thefifth pin 82′ and thehook portion 84′ of thepawl 80′. According to this embodiment, thecontact face 98′ extends transversely from aplanar body portion 99′ of thepawl 80′. As best illustrated inFIGS. 12, 15 and 17 , anactuator 100′ is positioned in alignment with thecontact face 98′. Theactuator 100′ includes a linearlyextendable contact member 102′ for engaging thecontact face 98′ to cause thepawl 80′ to rotate about thefifth pin 82′ from the locked position into an unlocked position (illustrated inFIGS. 15-18 ). Rotating thepawl 80′ into the unlocked position allows thesecond link 38′ to pivot about thefirst pivot pin 64′, and thus allows the deploybracket 34′ to pivot into the deployed position, thus also allowing thehood bracket 32′ and hood to move into the deployed position. It should be appreciated that other components of theactive hinge 14′ may be configured to move relative to one another in a similar manner in response to actuation of theactuator 100′ or other actuators. - It should be appreciated that the
pawl active hinge contact face pocket fifth pin pawl - As schematically illustrated in
FIG. 15 , theactuator 100′ is configured to selectively actuate in response to a control signal being provided by acontroller 104′ associated with an active passengerprotection control system 106′ in response to one or more vehicle-mountedsensors 108′ or other detection devices detecting the occurrence of a pedestrian collision. In the example shown, theactuator 100 includes anelectrical connector 110 that would be in electrical connection with the sensor(s) 180 and/or thecontroller 104 such that an electrical control signal is generated to control actuation of theactuator 100′. - It should be appreciated that the
pawl safety bolt hood bracket 32, deploybracket 34 orlinks active hinge 14′ may be assembled in accordance with the method presented inFIG. 11 . -
FIGS. 19-20 present a third embodiment of apawl 80A according to an aspect of the disclosure. According to this embodiment, thelower pocket 86A of thehook portion 84A of thepawl 80A is extended such that it surrounds more than half of the outer circumference of thesafety bolt 88 to provide increased locking security while thepawl 80A is positioned in the locked position. As shown, a first distance L1 between the pivotfifth pin 82 and theengagement face 85 is more than twice that of a second distance L2 between thefifth pin 82 and thecontact face 98. This provides a further reduced actuator stroke length for moving thepawl 80A from the locked to unlocked position. - Now referring to
FIG. 21A andFIG. 21B , in addition toFIGS. 1 through 20 , anactive hinge 9 is provided and includes ahood bracket 32 for attachment to avehicle hood 12, abody bracket 30 for attachment to a vehicle body, and may include a number of intermediary components such asbracket 34 andlinkages locking mechanism 200, forexample pawl 80, is coupled between thehood bracket 32 and thebody bracket 30, thelocking mechanism 200 comprising an unlocked state for example as shown inFIGS. 8 and 15 for allowing thehood bracket 32 to move away (e.g. upwardly) from thebody bracket 30 and a locked state for example as shown inFIG. 5 andFIG. 13 preventing thehood bracket 32 to move away from thebody bracket 30, thelocking mechanism 200 further comprising abolt 88 in a tensed relationship with thelocking mechanism 200 for maintaining thelocking mechanism 200 in the locked state. Anactuator 100 is provided for selectively actuating, for example a pyrotechnic actuator deploying a plunger in response to receiving an electrical signal corresponding to a detection of a pedestrian impact from acontroller 300 or by a body control module (BCM), the locking mechanism for transitioning thelocking mechanism 200 from the locked state to the unlocked state, such that the selectively actuating thelocking mechanism 200 relieves the tensed relationship to allow thelocking mechanism 200 to transition from the locked state to the unlocked state, and allow thehood 12 to be deployed to an active pedestrian protection position as shown inFIG. 21B (illustrating thehood 12 allowed to move upwards by a continued actuation ofactuator 100, or by another actuation system/mechanism not shown). During the relief of the tensed relationship, for example thepawl 80 disengaging thebolt 88, the tension may momentarily increase or the tension may remain the same, or the tension may decrease, depending on the geometry of thepawl 80 and desired level of safety and the size of theactuator 100. Thelocking mechanism 200 may include a moveable lever, illustrated as apivotal pawl 80, configured for movement (e.g. linear movement or rotational movement) between a locked position and an unlocked position, with the moveable lever having an engagement surface, also referred to hereinabove asengagement face 85, for tensed engagement with thebolt 88 when the moveable lever is in the locked position to establish the locking state of thelocking mechanism 200. The configuration whereby the moveable lever is apawl 80 configured for pivotal movement about apivot axis 82 between a locked position and an unlocked position, thepawl 80 has an engagement surface, forexample engagement face 85, for engagement with thebolt 88 when thepawl 80 is in the locked position to establish the locking state of thelocking mechanism 200, with the tensed relationship established by a portion of thebolt 88, for example shown as approximately 50% of the outer circumferential surface of thebolt 88 as seen inFIG. 8 exerting a force F against theengagement surface 85 of thepawl 80 biasing thepawl 80, for example via theengagement surface 85, away from thepivot axis 82. The tensed relationship, for example due to the expansion forces of thebolt 88 acting on thepawl 80, is established when thepawl 80 is in the locked position and a portion (e.g. flared head) of thebolt 88 is in an expanded state relative to the other portion of the bolt 88 (e.g. unflared stem). Illustratively as shown inFIG. 10B the expanded state of thebolt 88 is shown as a flared head portion, or top portion 91, due to an applied compression of thebolt 88 in a pre-assembly state where thebolt 88 may be for example a linear pin or straight cylindrical structure, for example during positioning of thepawl 80 in the locked position, to deform the pin to an assembled state where it may engage withupper pocket 92. A further applied compression of thebolt 88 may be provided to further spread out theupper pocket 92 to further engage the planar surface 95 of thepawl 80, as shown inFIG. 10C . Thepawl 80 has ahook portion 84 having the engagement surface defining apocket 86 receiving thebolt 88, and for example partially receiving thebolt 88, such that at least a portion of thebolt 88 is in a path blocking a motion of the hook (e.g. counterclockwise as shown inFIG. 8 ) when thepawl 80 is in the locked position, for preventing vibrations due to movement e.g. chucking of thepawl 80 against thebolt 88. The at least a portion of thebolt 88 may remain in a path blocking a motion of the hook 84 (e.g. counterclockwise as shown inFIG. 8 ) when thepawl 80 is being moved from the locked position towards the unlock position. Selectively actuating thelocking mechanism 200 e.g. releasing thelocking mechanism 200 causes thehook 84, which may be for example the tip ofhook 84, to bypass the portion of thebolt 88 blocking the motion of thehook 84, such that thehook 84 bypassing the portion of thebolt 88 blocking the motion of thehook 84 causes a localized deformation of at least one of thebolt 88 and thepawl 80. As a result of the tensed relationship established between thepawl 80 and thebolt 88, thepawl 80 may be maintained in the locked position without use of a spring, for example which may otherwise be required to bias thepawl 80 in the clockwise direction as viewed inFIG. 8 and prevent vibrations. The use of a bolt in lieu of a spring is lower cost and easier to assemble and provide increases in securing of thepawl 80. When in the tensed relationship, the applied force exerted by the expandedbolt 88 may increase the coefficient of friction between thebolt 88 and theengagement surface 85 enhancing the securing of thepawl 80 against movement. During movement of thepawl 80, such increase in the coefficient of friction is overcome by the force of theactuator 100, which may not be overcome due to vibrations during normal operation of the vehicle e.g. driving. Thepawl surface 85 may therefore be caused to slide against thebolt 88 with resistance proportional to the expansion force of thebolt 88 during movement of thepawl 80 from its locked position to its unlocked position. In additional to frictional forces resisting a relative movement of thepawl 80 along thebolt 88, after expansion of thebolt 88 to its flared or expanded assembled state, the flared portion of thebolt 88 may adopt a blocking position against a movement of thepawl 80, forexample hook portion 84 of pawl.Hook portion 84 may therefore not only increase the surface contact area of thepawl 80 with thebolt 88 e.g. the outer flared perimeter of thebolt 88, but also thebolt 88 may block thehook portion 84. As a result, during release,hook portion 84 in order to bypass the blocking positioning of the expandedbolt 88 may be caused due to the force of theactuator 100 to slightly deform a portion of the perimeter of thebolt 88. For example the perimeter of thebolt 88 may be deformed by thehook 84 scrapping or indenting or the like the perimeter of thebolt 88, or thehook portion 84 may cause a larger bending or deflection of thebolt 88, or thehook portion 84 itself may be deformed, for example bent to allow thepawl 80 to move from the locked position to the unlocked position, depending on the relative strength of the materials of thepawl 80 and thebolt 88. In an embodiment, thebolt 88 may be pivotally mounted such that during thepawl 80 moving from the locked position to the unlocked position the engagement of thepawl 80 with thebolt 88 may cause the bolt to rotate e.g. counterclockwise as shown inFIG. 8 . -
FIGS. 23-25 illustrate a third embodiment of anactive hinge 14″ according to another aspect of the disclosure.Active hinge 14″ permitshood bracket 32″ to move upwardly and rearwardly while deploybracket 34″ is prevented from moving about itspivot point 29″ or coupling withbody bracket 32′″. As a result theactive hinge 14″ is allowed to be positioned in an active pedestrian deployed position without during its movement interfering with surrounding sheet metal of thevehicle body 11, which would be contacted by the deploybracket 34″ and possibly damaged or limit the range of motion of theactive hinge 14″ to its deployed position if allowed to move during an active pedestrian deployment position, for example with a configuration as shown inFIG. 23 andFIG. 26 where deploybracket 34″ pivots aboutpivot point 29″ during an active deployment operation. As seen inFIG. 26 , pivoting ofhood bracket 32″ relative to deploybracket 34″ may causehood 12″ to interfere with anadjacent vehicle body 11, such as a body panel, wiper or the like, as illustrated by travel of a trailingedge 15″ ofhood 14″ along an travel path show as a phantom art, in one example. - As best illustrated in
FIGS. 24 and 25 , theactive hinge 14″ includes ahood bracket 32″ that is pivotally connected to a deploybracket 34″. Apawl 80″ is pivotally connected to thehood bracket 32″. Thepawl 80″ is pivotable between a locked position and an unlocked position, for example in a manner as described herein above. While in the locked position, pivoting movement of thehood bracket 32″ relative to the deploybracket 34″ is inhibited, and while in the unlocked position, pivoting movement of thehood bracket 32″ relative to the deploybracket 34″ is permitted.FIG. 24 illustrates thehood bracket 32″ in a closed, unpivoted positioned relative to the deploybracket 34″ and with thepawl 80″ in the locked position.FIG. 25 illustrates thehood bracket 32″ in an open, pivoted position relative to the deploybracket 34″ after thepawl 80″ has been moved into the unlocked position. The deploy bracket is pivotally connected to abody bracket 30″.FIG. 26 shows a possible interference between thehood edge 31″ with a surrounding portion of thevehicle body 11, such as a flare from a surrounding fender or of a fixed hood portion, as examples only, ifhood 12″ moves aboutpivot point 29″, or in other words if theactive hinge 14″ provides for a pivoting of deploybracket 34″ aboutpivot point 29″ during movement of thehood 12″ to an active pedestrian deployment position. - Now referring to
FIGS. 27 to 29 , a further embodiment of anactive hinge 14′″ includes alocking hook 116′″ that is pivotally connected to thebody bracket 30′″. Thehook 116′″ presents anengagement flange 118′″ that is positioned for removably engaging atab 120′″ of the deploybracket 34′″. Thelocking hook 116′″ is pivotable between a first position in which theengagement flange 118′″ is spaced from thetab 120′″ thus allowing pivoting movement of the deploybracket 34′″ relative to thebody bracket 32′″, for example during a normal hood opening operation e.g. non-active pedestrian deployment operation, and a second position in which theengagement flange 118′″ engages thetab 120′″ for inhibiting pivoting of the deploybracket 34′″ relative to thebody bracket 32′″, for example during an active pedestrian deployment operation. Thelocking hook 116′″ further presents anactuation surface 122′″ that is positioned in axial alignment with anactuator 100′″. The portion of theactuation surface 122′″ that is axially aligned with theactuator 100′″ is radially spaced from the pivoting point 123″ of thelocking hook 116″″, illustratively provided on thebody bracket 34′″, which causes thelocking hook 116′″ to rotate in response to linear movement of theactuator 100′″ to a position as shown inFIG. 29 - As illustrated in
FIGS. 30-37 , during operation, in response to a detection of an occurrence of a pedestrian collision, a linearlyextendable contact member 102′″ of theactuator 100′″ is configured to move and engage theactuation surface 122′″ of thelocking hook 116″″ thus moving thelocking hook 116′″ into the second position and inhibiting pivoting of the deploybracket 34′″ relative to thebody bracket 32″″ effectively locking the deploybracket 34′″ to thebody bracket 32′″. Lockinghook 116′″ is shown to include a recessednotch 115′″ for assisting with the locking by engagement with thetab 120′″, also referred to herein as an engagement feature, when moving thelocking hook 116′″ into the second position. Engagement feature may be a protruding pin, a stamped or folded portion of thebracket 34′″ or a lug, or the like. - As illustrated in
FIGS. 38-41 , as thecontact member 102′″ moves theactuation surface 122″″ theactuation surface 122′″ engages acontact face 98′″ of thepawl 80″″ which causes thepawl 80′″ to rotate from the locked position toward the locked position. After a predetermined amount of linear movement of thecontact member 102′″ has occurred, the lockinghook 116′″ has rotated enough such that it clears thecontact member 102′″. At this point, thecontact member 102″″ directly engages and pushes on acontact surface 124′″ of thehood bracket 32′″. At this point, thepawl 80′″ has rotated into the unlocked position, thus allowing pivoting movement of thehood bracket 32′″ relative to the secondary lever 113′″, and pivoting movement of the secondary lever 113′″ relative to thebody bracket 30′″. Because the deploybracket 34′″ is inhibited from moving at this time by the lockinghook 116″″, and because thesecondary lever 114′″ is pivotable connected to the deploy bracket 23′″ at a location that is spaced from where the deploy bracket 23′″ is coupled with thebody bracket 34″″ thehood bracket 32′″ (andhood 12′″) may move in an upward and rearward direction relative to thebody bracket 30″″ as best illustrated inFIGS. 40 and 41 . - Furthermore, because the deploy bracket 23′″ remains stationary and does not move upwards or rearwards during movement of the
hood bracket 32′″ during an occurrence of a pedestrian collision, damage and interference with body panels and/or wiper motors, wiper linkages, etc. is prevented. It should also be appreciated that prior to firing of theactuator 100′″, the lockinghook 116′″ is in the first position with theengagement flange 118′″ spaced from thetab 120′″ thus allowing pivoting movement of the deploybracket 34′″ relative to thebody bracket 32′41 and normal opening of thehood 12″. - With reference to the figures herein, there is provided an
active hinge 14′″ including ahood bracket 32′″ for attachment to avehicle hood 14″', abody bracket 30″' for attachment to avehicle body 11, a deploybracket 34′″ pivotally attached between thehood bracket 32′″ and thebody bracket 30′″, thehood bracket 32′″ being moveable relative to thebody bracket 30′″ between a non-deployed position and a deployed position, alocking hook 116′″ pivotally mounted to one of thebody bracket 30′″ and the deploy bracket, and anengagement feature 120′″ for engagement by the lockinghook 116′″, theengagement feature 120′″ provided on another one of thebody bracket 30′″ and the deploybracket 34″, and further including anactuator 100′″ for selectively pivoting thelocking hook 116′″ for engaging thelocking hook 116′″ with theengagement feature 120′″ to prevent the deploybracket 34′″ from moving relative to thebody bracket 30′″ and for moving thehood bracket 32′″ from the non-deployed position to the deployed position. Theengagement feature 120′″ may be provided on the deploybracket 34′″ and thelocking hook 116′″ is pivotally mounted to thebody bracket 30′″, as illustratively shown inFIG. 28 . The deploybracket 34′″ may be pivotally mounted to thebody bracket 30′″ as illustratively shown inFIG. 27 . At least onelink 129′″, and one link shown inFIG. 41 for illustrative purposes, may be provided for pivotally coupling thehood bracket 32′″ to the deploybracket 34′″, for example pivotally coupled to the deploybracket 34′″ atpivot 31′″ and to thehood bracket 32′″ atpivot 131″. As also illustrated inFIG. 41 for example, apivot point 29′″ of the deploybracket 34′″ relative to thebody bracket 30′″ is offset from thepivot point 31′″ of thehood bracket 32′″ relative to the deploybracket 34′″, to allow for example a different path of travel of thehood bracket 32′″ during a normal operation for example when pivoting aboutpivot point 29′″ as shown illustratively by phantom lines inFIG. 34 for example, and during an active pedestrian protection operation for example when pivoting aboutpivot point 31′″ as shown illustratively by phantom lines inFIG. 41 . Thehood bracket 32′″ when moved from the non-deployed position (FIG. 39 ) to the deployed position (FIG. 41 ), will follow a path of travel of thehood bracket 32′″ when thelocking hook 116′″ is in engagement with theengagement feature 120′″ (FIG. 41 ) is different from a path of travel of thehood bracket 32′″ when thelocking hook 116′″ is in disengagement from theengagement feature 120′″ (FIG. 34 ). Thelocking hook 116′″ includes a recessednotch 115′″ (FIG. 38 ) for receiving theengagement feature 120′″when theengagement feature 120′″ is engaged wit thelocking hook 116′″. Theengagement feature 120′″ may be projecting tab, such astab 120′″ formed with the deploybracket 34′″, and for example formed from a folded portion of the deploybracket 34′″ as shown. Theactive hinge 14′″ may further include apawl 80′″ pivotally mounted to thehood bracket 32′″ for releasable coupling, such as the compressible connection described herein above as an example, to the deploybracket 34′″ such that theactuator 10′″ selectively pivots thepawl 80″″ for disengaging thepawl 80″″ from the deploybracket 34′″ (FIG. 39 ), to allow thehood bracket 32′″ to move from the non-deployed position to the deployed position in response to engagement of theactuator 100′″ with thehood bracket 32′″ (seeFIGS. 40 and 41 ). Theactive hinge 14′″ may further include abolt 88′″ for engagement by the pawl, thebolt 88′″ connected the deploybracket 34′″, such that the pivoting of thepawl 80′″ disengages the pawl from thebolt 88′″ to releaseable decouple thepawl 80″″ from the deploybracket 34′″, in a manner as described herein above. Theactuator 100′″ may be configured to engage thelocking hook 116′″ before engaging thepawl 80′″ (see sequence ofFIGS. 36, 39 and 40 ). Theactuator 100′″ may be configured to drive thehood bracket 32′″ relative to thebody bracket 30′″ in avertical direction 777 andhorizontal direction 888 to the deployed position (seeFIG. 41 ) subsequent to theactuator 100′″ pivoting thelocking hook 116′″ into engagement with theengagement feature 120′″. As a result thehood 12′″ may avoid contact with thevehicle body 11 during an active pedestrian protection operation of the active hood hinge 14′″, as shown inFIG. 41 . - Now referring to
FIG. 42 , in addition to the other Figures referred to herein, there is illustrated amethod 3000 for assembling an active hinge, themethod 3000 the steps of providing a hood bracket for attachment to avehicle hood 3002, providing a body bracket for attachment to avehicle body 3004, pivotally connecting a deploy bracket between the hood bracket and thebody bracket 3006, pivotally connecting a locking hook to one of the body bracket and the deploybracket 3008, providing an engagement feature on another one of the body bracket and the deploybracket 3010, and configuring the locking hook for pivoting into engagement with the engagement feature to prevent the deploy bracket from moving relative to the body bracket and for pivoting out of engagement with the engagement feature to permit the deploy bracket to move relative to thebody bracket 3012. Themethod 3000 further include providing an actuator for selectively pivoting the locking hook into engagement with the engagement feature. Themethod 3000 may further include pivotally connecting a pawl to the hood bracket, wherein the pawl defines a pocket, engaging the pawl with the deploy bracket to prevent the hood bracket to move from a non-deployed position to a deployed position, and configuring the pawl to disengage from the deploy bracket using the actuator to allow the hood bracket to move from the non-deployed position to the deployed position. Themethod 3000 may further include the step of configuring the actuator to engage the locking hook before engaging the pawl. Themethod 3000 may further include forming the engagement feature as a projecting tab with the one of the deploy bracket and the body bracket. Themethod 3000 may further include providing the engagement feature on the deploy bracket and pivotally mounting the locking hook to the body bracket. Themethod 3000 may further include pivotally mounting the deploy bracket to the body bracket about a pivot point. Themethod 3000 may further include coupling the hood bracket to the deploy bracket using at least one link, wherein the pivot point of the deploy bracket relative to the body bracket is offset from the pivot point of the hood bracket relative to the deploy bracket. Themethod 3000 may further include providing the lock hook with a recessed notch for receiving the engagement feature when the engagement feature is engaged with the locking hook. -
FIGS. 44-45 present a second embodiment of apawl 80A according to an aspect of the disclosure. According to this embodiment, thehook portion 84A of thepawl 80A is extended such that it surrounds more than half of the outer diameter of thesafety bolt 88 to provide increased locking security while thepawl 80A is positioned in the locked position. - Furthermore, the contact face 98A extends linearly away from a
body portion 81A by a length that is at least approximately one half of a maximum width W of thebody portion 81A. This provides a reduced actuator stroke length for moving thepawl 80A from the locked to unlocked position. -
FIGS. 46-57 present a fifth embodiment of anactive hinge 14E. As illustrated inFIG. 50 , theactive hinge 14E includes ahood bracket 23E for being connected to a hood of a vehicle, and a deploybracket 34E that is pivotally connected to thehood bracket 23E at end portions of thehood bracket 23E and deploybracket 34E. Thehood bracket 23E defines anelongated slot 74E that receives a slidingpin 72E that is connected to the deploybracket 34E for limiting pivoting movement of thehood bracket 23E relative to the deploybracket 34E. Apawl 80E is pivotally connected to thehood bracket 23E along ashear bolt 85E. Thepawl 80E defines ashear slot 87E which receives theshear bolt 85E. Thesheer slot 87E is larger than a diameter of thesheer bolt 85E, thus allowing thepawl 80E to be moved relative to theshear bolt 85E during assembly of theactive hinge 14E. Thepawl 80E is pivotable between a locked position in which ahook portion 84E of thepawl 80E engages asafety bolt 88E to prevent movement of thehood bracket 23E relative to the deploybracket 34E and an unlocked position in which thepawl 80E is spaced from thesafety bolt 88E to allow movement of thehood bracket 23E relative to the deploybracket 34E. Ashear screw 83E is positioned adjacent to thesafety bolt 88E. Theshear screw 83E is integrally formed with thehook portion 84E with a predetermined thickness such that a predetermined minimum force provided against acontact face 98E of thepawl 80E will cause the connection between theshear screw 83E and contact face 98E to break, thus allowing rotation of thepawl 80E. As shown inFIG. 46 , during ordinary usage, minor forces against thepawl 80E will not cause the connection between theshear screw 83E and contact face 98E to break, however, as shown inFIGS. 47-48 , during a collision event which causes a force to be applied against thecontact face 98E of thepawl 80E, a sufficient force is applied to break the connection between theshear screw 83E and thecontact face 98E. It should be appreciated that theshear screw 83E andcontact face 98E of thepawl 80E may be connected to one another in other ways to provide the predetermined minimum breaking force. - Steps for assembling the fifth embodiment of the
active hinge 14E are shown inFIGS. 49-57 . As shown inFIG. 49 , first, theshear screw 83E,pawl 80E andshear bolt 85E are fixed to thehood bracket 23E. As shown inFIG. 50 , thehood bracket 23E is loosely coupled to the deploybracket 34E by positioning thehook portion 84E of thepawl 80E about asafety bolt 88E that is fixed to the deploybracket 34E. During this step, thehood bracket 23E is postioned at an angle relative to the deploybracket 34E. As shown inFIG. 51 , assembly continues by rotating thehood bracket 23E about thesafety bolt 88E, downwardly toward the deploybracket 34E. As shown inFIG. 52 , assembly continues by aligning thehood bracket 23E relative to the deploybracket 34E such that a pivot holes 98E of thehood bracket 23E and deploybracket 34E are positioned in alignment with one another, and such that theshear slot 87E of thehood bracket 23E is in alignment with ashear orifice 91E of the deploybracket 34E. As shown inFIG. 49 , the method continues with installing apivot rivet 93E in the pivot holes 89E, and inserting theshear bolt 85E through theshear slot 87E and theshear orifice 91E to connect thehood bracket 23E and the deploybracket 34E. As shown inFIG. 54 , assembly continues with loosening theshear screw 83E, sliding thepawl 80E toward thesafety bolt 88E, and tightening the shear screw to 12 Nm of torque in order to fix the pawl about thesafety bolt 88E at a desired fit. As shown inFIGS. 55-57 assembly further includes compressing thesafety bolt 88E in an axial direction as previously described in order to securely fit the components of theactive hinge 14E. -
FIGS. 60-61 disclose an improved assembly and method for fixing anactuator 100F of a seventh embodiment of anactive hinge 14F to avehicle body component 126F according to an aspect of the disclosure. Similar to previous embodiments, theactive hinge 14F includes ahood bracket 23F for being connected to a hood of a vehicle and a deploybracket 34F that is pivotally connected to thehood bracket 23F. The deploybracket 34F is pivotally connected to abody bracket 126F via a pair oflinks 30F. Apawl 80F is pivotally connected to thehood bracket 23F and is moveable between an unlocked position in which it is spaced from asafety bolt 88F that is fixed to the deploybracket 34F for allowing relative movement between thehood bracket 23F and the deploybracket 34F, and a locked position in which thepawl 80F engages thesafety bolt 88F for inhibiting relative movement between thehood bracket 23F and the deploybracket 34F. - In order to provide a simple assembly step for mounting the
actuator 100F to thebody bracket 126F, thebody bracket 126F includes a pair of mountingbrackets 128F that are integrally formed in the sheet metal which makes up thebody bracket 126F. Thebody bracket 126F includes a generallyplanar base portion 130F. Each of the mountingbrackets 128F include aprotrusion portion 132F that protrudes convexly from thebase portion 130F and terminates at afixing tab 134F. Theprotrusion portions 132F overly a pair of mountingopenings 136F. Theactuator 100F includes a pair ofactuator brackets 138F that are each configured to be received between thebase portion 130F and theprotrusion portion 132F and fixingtab 134F of one of the mountingbrackets 128F in order to align and secure theactuator 100F into a desired position relative to thebody component 126F. It should be appreciated that mounting theactuator 100F in this manner advantageously allows theactuator 100F to be aligned and secured to thebody bracket 126F without the use of bolts or other separate fastening components. Thebody bracket 126F further includes asupport 140F that protrudes outwardly relative to thebase portion 130F at a location that is positioned below theactuator brackets 138F. Thesupport 140F aligns and supports a tube portion of theactuator 100F to provide improved stability to theactuator 100F. -
FIGS. 62-63F disclose an eighth embodiment of anactive hinge 14G. As best shown inFIG. 38 , similar to previous embodiments, theactive hinge 14G includes ahood bracket 23G for being connected to a hood of a vehicle and a deploybracket 34G that is pivotally connected to thehood bracket 23G. The deploybracket 34G is pivotally connected to abody bracket 30G by apivot linkage mechanism pivot linkage mechanism first link 36G and asecond link 38G arranged to define a four-bar linkage. Thefirst link 36G has one end pivotally connected to thebody bracket 30G and its opposite end pivotally connected to the deploybracket 34G. Similarly, asecond link 38G has a first end pivotally connected to thebody bracket 30G and a second end pivotally connected to the deploybracket 34G. Thehood bracket 23G defines anelongated slot 74G that receives a slidingpin 72G that is connected to the deploybracket 34G for limiting pivoting movement of thehood bracket 23G relative to the deploybracket 34G. - A
pawl 80G is pivotally connected to thehood bracket 23G (or deploybracket 34G) along afifth pin 82G and includes ahook portion 84G that defines alower pocket 86G. Thehook portion 84G is spaced from thefifth pin 82G. Asafety bolt 88G is fixed to the deploybracket 34G (orhood bracket 23G). Thehook portion 84G of thepawl 80G is configured to partially surround thesafety bolt 88G while thepawl 80G is positioned in a locked position to inhibit pivoting of the hood bracket 32G relative to the deploybracket 34G about athird pivot pin 70G. - An
actuator 100G is positioned in alignment with acontact face 98G ofpawl 80G. Thecontact face 98G is spaced from thehook portion 84G. Theactuator 100G includes a linearlyextendable contact member 102G for engaging thecontact face 98G to cause thepawl 80G to rotate about thefifth pin 82G from the locked position into an unlocked position (illustrated inFIGS. 59C-59F ). Rotating thepawl 80G into the unlocked position allows the hood bracket 32G to pivot about thethird pivot pin 70G relative to the deploybracket 34G. When actuated, thecontact member 102G of the actuator 100G also engages ashelf 101G of the deploybracket 34G to cause the deploybracket 34G andhood bracket 23G to move upwardly relative to thebody bracket 30G by way of the first andsecond links actuator 100G is configured to selectively actuate in response to a control signal being provided by acontroller 104G associated with an active passengerprotection control system 106G in response to one or more vehicle-mountedsensors 108G or other detection devices detecting the occurrence of a pedestrian collision. - The
active hinge 14G further includes at least onelocking element hood bracket 23G relative to thebody bracket 34G after theactuator 100G has been actuated during a collision event, and for inhibiting upward and downward movement of thehood bracket 23G after deployment of theactive hinge 14G. The at least onelocking element hood bracket 23G relative to thebody bracket 34G and a locked state to limit or restrict movement of thehood bracket 23G relative to thebody bracket 34G. More particularly, according to the example embodiment, the lockingelement contour 150G, afirst locking element 154G and asecond locking element 152G. The lockingcontour 150G extends upwardly from a top surface of thebody bracket 30G. The lockingcontour 150G general has a hook shape and defines apocket 156G. Thesecond locking element 152G is rotatably fixed to thepawl 80G along thefifth pin 82G. Thesecond locking element 152G extends radially outwardly from thefifth pin 82G. Thefirst locking element 154G is pivotally connected to the deploybracket 34G along a sixth pivot pin 158G. Thefirst locking element 154G generally has an L-shape and has afirst leg 160G and asecond leg 162G that meet at the sixth pivot pin 158G. Thefirst leg 160G terminates at atab 161G that extends generally perpendicularly to the rest of thefirst leg 160G, and thesecond leg 162G terminates at alip 166G that extends perpendicularly to the rest of thesecond leg 162G. Abiasing mechanism 164G, such as a torsion spring, biases thefirst locking element 154G in a counter-clockwise direction. -
FIG. 63A presents theactive hinge 14G in an initial, closed position. In this position, thepawl 80G is in the locked position, and thesecond locking element 152G is rotationally aligned with, and engages thetab 161G of thefirst leg 160G of thefirst locking element 154G. As such an illustrative example of operable cooperation between thepawl 80G and the at least onelocking element first locking element 154G is biased against thesecond locking element 152G, which prevents rotation of thefirst locking element 154G relative to thesecond locking element 152G. -
FIG. 63B presents theactive hinge 14G after initial firing of theactuator 100G. In this figure, thecontact member 102G of theactuator 100G has engaged thecontact face 98G of thepawl 80G, thus causing counter-clockwise rotation of thepawl 80G andsecond locking element 152G about thefifth pivot pin 82G. This causes thesecond locking element 152G to be positioned rotationally out of alignment with thefirst leg 160G of thefirst locking element 154G, thereby allowing thefirst locking element 154G to rotate counter-clockwise about the sixth pivot pin 158G to a point at which thesecond leg 162G of thefirst locking element 154G engages anouter surface 168G of thebody bracket 30G. It should be appreciated that this initial movement of thesecond locking element 152G occurs prior to movement of the deploybracket 34G relative to thebody bracket 30G. -
FIG. 63C presents theactive hinge 14G after thepawl 80G has been rotated completely out of alignment with thesafety bolt 88G. In this position, thesecond locking element 152G has rotated to a fully unlocked position in which it engages thesafety bolt 88G. At this point, theactuator 100G has started causing upward movement of the deploybracket 34G relative to thebody bracket 30G. -
FIG. 63D presents theactive hinge 14G after the deploybracket 34G has moved upwardly to a certain degree relative to thebody bracket 30G. As shown, during this upward movement, thesecond leg 162G follows a radius of theouter surface 168G of thebody bracket 30G because it is biased against theouter surface 168G. -
FIG. 63E presents theactive hinge 14G after the deploybracket 34G has moved upwardly relative to thebody bracket 30G to a point at which thelip 166G of thesecond leg 162G of thefirst locking element 154G is caught in thepocket 156G of the lockingcontour 150G in an inhibiting position. At this point, the lockingcontour 150G inhibits the deploybracket 34G, andhood bracket 23G/hood, from moving upwardly any further. It should be appreciated that this allows the extent of movement of the hood to be limited to a predetermined extent to provide increased safety. -
FIG. 63F presents theactive hinge 14G in a scenario in which a downward force is applied against the hood. As shown, movement of the deploybracket 34G is inhibited because thelip 166G engages a bottom surface of the lockingcontour 150G inside thepocket 156G. As such, lockingelement hood bracket 23G after deployment of theactive hinge 14G. -
FIGS. 64A and 64B present an alternate embodiment of thefirst locking element 154H which includes a loweringfeature actuator 100G has been actuated, such as during a collision event. As illustrated, the loweringfeature 180H, 172H includes anopening 170H that is defined between the second leg 162H0 and thelip 166H. The loweringfeature 180H, 172H further includes a pair ofdeformation legs 172H which are defined on opposite sides of theopening 170H. Thedeformation legs 172H allow a degree of deformation of thefirst locking element 154H along thedeformation legs 172H during the application of a downward force against the hood. Locking element 154 therefore may be shifted to an unlocked state as a result of such an application of force, for example shifted into a state which allows downward movement of the hood. It should be appreciated that the size and thickness of thedeformation legs 172H may be tuned to allow a predetermined amount of such deformation. This can advantageously provide increased safety because thedeformation legs 172H can be tuned to allow for deformation/collapsing of the hood in response to a specific predetermined force, such as that experienced during impact of a pedestrian's head against the hood. -
FIG. 65 presents an alternative embodiment of a loweringfeature 174H of the lockingcontour 150H which also allows for a degree of downward movement of the hood during the application of a downward force against the hood after theactuator 100G has been actuated. In this embodiment, the loweringfeature 174H includes achannel portion 174H defined by thepocket 156H which extends further into the lockingcontour 150H than the rest of thepocket 156H. According to this embodiment, after theactuator 100G has been fired, thelip 166G is rotated into thechannel portion 174H. Upon the application of a downward force against the hood, due to a radius of thechannel portion 174H, thelip 166G is able to slide downwardly out of thechannel portion 174H, thus allowing a degree of downward movement of the hood. It should be appreciated that thechannel portion 174H may be shaped and sized to allow for a predetermined amount of movement. Again, this feature can advantageously provide increased safety because thechannel portion 174H can be tuned to allow for deformation/collapsing of the hood in response to a specific predetermined force, such as that experienced during impact of a pedestrian's head against the hood. - It should be appreciated that the aforementioned first and second locking elements and locking contour may similarly be incorporated into one-joint active hinge designs.
- A method of operating an
active hinge 14G per the teachings of the eighth embodiment of the activatehinge 14G is illustrated inFIG. 66 . The method includes 4000 providing thehood bracket 23G, thebody bracket 30G, the deploybracket 34G, thepawl 80G and thebolt 88G. The method may further include 4002 actuating theactuator 100G in response to a detection of a collision event, wherein the actuator moves thepawl 80G from a locked position in which thepawl 80G engages thebolt 88G to fix thehood bracket 23G relative to the deploybracket 34G, to an unlocked position in which thepawl 80G is spaced from thebolt 88G allowing relative movement between thehood bracket 23G and the deploybracket 34G andbody bracket 30G. The method may further include 4004 stopping movement of thehood bracket 23G relative to thebody bracket 30G with the lockingelement hood bracket 23G has moved a predetermined distance relative to thebody bracket 30G. This step may include 4006 receiving thefirst locking element 154G in the lockingcontour 150G after thehood bracket 23G has moved the predetermined distance relative to thebody bracket 30G. This step may further include 4008 biasing thefirst locking element 154G toward the lockingcontour 150G with abiasing mechanism 156G. This step may further include 4010 preventing rotation of thefirst locking element 154G, such as with thesecond locking element 152G, until the pawl is rotated into the unlocked position from the locked position. The method may further include 4012 moving thehood bracket 23G relative to thebody bracket 30G with theactuator 100G after moving thepawl 80G from the locked position to the unlocked position until movement of thehood bracket 23G is stopped by the lockingelement actuator 100G against theshelf 101G of thehood bracket 23G. After deployment of theactive hinge 14G, the method may further include 4014 inhibiting upward and downward movement of thehood bracket 23G with the lockingelement hood bracket 23G is stopped by the lockingelement hood bracket 23G downward to predetermined extent with the loweringfeature actuator 100G has been actuated, such as during a collision event. - The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting. As used herein, the singular forms “a,” “an,” and “the” may be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms “comprises,” “comprising,” “including,” and “having,” are inclusive and therefore specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in that particular order discussed or illustrated, unless specifically identified as an order of performance. It is also to be understood that additional or alternative steps may be employed.
- When an element or layer is referred to as being “on,” “engaged to,” “connected to,” or “coupled to” another element or layer, it may be directly on, engaged, connected or coupled to the other element or later, or intervening element or layers may be present. In contrast, when an element is referred to as being “directly on,” “directly engaged to,” “directly connected to,” or “directly coupled to” another element or layer, there may be no intervening elements or layers present. Other words used to describe the relationship between elements should be interpreted in a like fashion (e.g., “between” versus “directly between,” “adjacent” versus “directly adjacent,” etc.). As used herein, the term “and/or” includes any and all combinations of one or more of the associated listed items.
- Although the terms first, second, third, etc. may be used herein to described various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as “first,” “second,” and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.
- Spatially relative terms, such as “inner,” “outer,” “beneath,” “below,” “lower,” “above,” “upper,” and the like, may be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. Spatially relative terms may be intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as “below” or “beneath” other elements or features would then be oriented “above” the other elements or features. Thus, the example term “below” can encompass both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
- The foregoing description of the embodiments has been provided for purposes of illustration and description. It is not intended to be exhaustive or to limit the disclosure. Individual elements or features of a particular embodiment are generally not limited to that particular embodiment, but, where applicable, are interchangeable and can be used in a selected embodiment, even if not specifically shown or described. The same may also be varied in many ways. Such variations are not to be regarded as a departure from the disclosure, and all such modifications are intended to be included within the scope of the disclosure.
Claims (20)
1. An active hinge comprising:
a hood bracket for attachment to a vehicle hood;
a body bracket for attachment to a vehicle body;
a deploy bracket pivotally connected to the hood bracket and the body bracket;
a pawl pivotally connected to one of the hood bracket and the deploy bracket and a bolt fixed to the other of the hood bracket and the deploy bracket, wherein the pawl is moveable between a locked position wherein the pawl engages the bolt to fix the hood bracket relative to the deploy bracket, and an unlocked position in which the pawl is spaced from the bolt allowing relative movement between the hood bracket and the deploy bracket;
an actuator configured to move the pawl from the locked position to the unlocked position and to cause the hood bracket to move relative to the body bracket in response to a detection of a collision event; and
at least one locking element limiting movement of the hood bracket relative to the body bracket.
2. The active hinge as set forth in claim 1 wherein the at least one locking element includes a first locking element rotatable relative to the deploy bracket, and a locking contour fixed to the body bracket, and wherein the first locking element is configured to be received by the locking contour in an inhibiting position in response to actuation of the actuator to inhibit movement of the hood bracket relative to the body bracket.
3. The active hinge as set forth in claim 2 wherein the first locking element includes a biasing mechanism biasing the first locking element toward the locking contour in the inhibiting position.
4. The active hinge as set forth in claim 3 wherein the at least one locking element includes a second locking element rotatable with the pawl, and wherein the second locking element is configured to prevent rotation of the first locking element into the inhibiting position until the pawl is rotated into the unlocked position from the locked position.
5. The active hinge as set forth in claim 4 wherein the first locking element includes a first leg and a second leg, wherein the second leg extends at an angle relative to the first leg, wherein the first leg engages the second locking element when the pawl is located in the locked position, and wherein the second leg engages the locking contour when the pawl is located in the unlocked position.
6. The active hinge as set forth in claim 5 wherein the second leg terminates at a lip that extends at an angle relative to the second leg, and wherein the lip is configured to receive the locking contour when the pawl is located in the unlocked position.
7. The active hinge as set forth in claim 1 wherein the actuator is fixed to the body bracket and aligned with the hood bracket such that the actuator moves the hood bracket relative to the body bracket.
8. The active hinge as set forth in claim 1 wherein the at least one locking element includes a lowering feature configured to allow the hood bracket to move toward the body bracket in response to an application of a downward force against the vehicle hood.
9. A method of operating an active hinge of a vehicle during a collision event, comprising:
providing a hood bracket for attachment to a vehicle hood;
providing a body bracket for attachment to a vehicle body;
providing a deploy bracket pivotally connected to the hood bracket and the body bracket;
providing a pawl pivotally connected to one of the hood bracket and the deploy bracket;
providing a bolt fixed to the other of the hood bracket and the deploy bracket;
actuating an actuator in response to a detection of the collision event, wherein the actuator moves the pawl from a locked position in which the pawl engages the bolt to fix the hood bracket relative to the deploy bracket, to an unlocked position in which the pawl is spaced from the bolt allowing relative movement between the hood bracket and the deploy bracket; and
inhibiting movement of the hood bracket relative to the body bracket with a locking element after the hood bracket has moved a predetermined distance relative to the body bracket.
10. The method as set forth in claim 9 further including moving the hood bracket relative to the body bracket with the actuator after moving the pawl from the locked position to the unlocked position until movement of the hood bracket is stopped by the locking element.
11. The method as set forth in claim 10 wherein the actuator is fixed to the body bracket and wherein moving the hood bracket relative to the body bracket with the actuator includes engaging the hood bracket with the actuator.
12. The method as set forth in claim 9 further including inhibiting upward and downward movement of the hood bracket with the locking element after movement of the hood bracket is stopped by the locking element.
13. The method as set forth in claim 11 wherein the locking element includes a first locking element rotatable relative to the deploy bracket, and a locking contour fixed to the body bracket, and wherein the method first includes receiving the first locking element in the locking contour after the hood bracket has moved the predetermined distance relative to the body bracket.
14. The method as set forth in claim 12 further including biasing the first locking element toward the locking contour with a biasing mechanism.
15. The method as set forth in claim 14 further including preventing rotation of the first locking element until the pawl is rotated into the unlocked position from the locked position.
16. An active hinge comprising:
a hood bracket for attachment to a vehicle hood;
a body bracket for attachment to a vehicle body;
a deploy bracket pivotally connected to the hood bracket and the body bracket;
a locking mechanism releasably coupling the hood bracket and the deploy bracket, wherein the locking mechanism comprises a locked state to fix the hood bracket relative to the deploy bracket, and an unlocked state to allow relative movement between the hood bracket and the deploy bracket; and
at least one locking element limiting movement of the hood bracket relative to the body bracket.
17. The active hinge of claim 16 , wherein the locking mechanism and the at least one locking element are configured for operable cooperation, wherein the locking mechanism in the locked state maintains the at least one locking element in an unlocked state for allowing the movement of the hood bracket relative to the body bracket and the locking mechanism in the unlocked state allows the at least one locking element to transition to a locked state from the unlocked state to limit movement of the hood bracket relative to the body bracket.
18. The active hinge of claim 17 , further comprising an actuator configured to shift the locking mechanism from the locked state to the unlocked state and to cause the hood bracket to move relative to the body bracket.
19. The active hinge of claim 18 , wherein the actuator moves the hood bracket relative to the body bracket after shifting the locking mechanism from the locked state to the unlocked state until movement of the hood bracket is stopped by the at least one locking element.
20. The active hinge of claim 17 , wherein the at least one locking element is configured to shift to the unlocked state from the locked state in response to an application of a downward force against the vehicle hood to allow the hood bracket to move toward the body bracket.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US17/440,369 US20220185226A1 (en) | 2019-04-15 | 2020-04-09 | Active pedestrian hood hinge with integrated latch assembly |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201962834329P | 2019-04-15 | 2019-04-15 | |
US17/440,369 US20220185226A1 (en) | 2019-04-15 | 2020-04-09 | Active pedestrian hood hinge with integrated latch assembly |
PCT/CA2020/050476 WO2020210897A1 (en) | 2019-04-15 | 2020-04-09 | Active pedestrian hood hinge with integrated latch assembly |
Publications (1)
Publication Number | Publication Date |
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US20220185226A1 true US20220185226A1 (en) | 2022-06-16 |
Family
ID=72836900
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US17/440,369 Abandoned US20220185226A1 (en) | 2019-04-15 | 2020-04-09 | Active pedestrian hood hinge with integrated latch assembly |
Country Status (4)
Country | Link |
---|---|
US (1) | US20220185226A1 (en) |
CN (1) | CN113710548B (en) |
DE (1) | DE112020001969T5 (en) |
WO (1) | WO2020210897A1 (en) |
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---|---|---|---|---|
KR102598536B1 (en) * | 2018-10-05 | 2023-11-03 | 현대자동차주식회사 | Always Operation Apparatus for Active Hood linked with ADAS |
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- 2020-04-09 WO PCT/CA2020/050476 patent/WO2020210897A1/en active Application Filing
- 2020-04-09 CN CN202080028529.8A patent/CN113710548B/en active Active
- 2020-04-09 US US17/440,369 patent/US20220185226A1/en not_active Abandoned
- 2020-04-09 DE DE112020001969.1T patent/DE112020001969T5/en active Pending
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Also Published As
Publication number | Publication date |
---|---|
CN113710548B (en) | 2024-05-03 |
CN113710548A (en) | 2021-11-26 |
WO2020210897A1 (en) | 2020-10-22 |
DE112020001969T5 (en) | 2022-03-17 |
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